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89
security advisoryfedoraDoSFedora 42 libmaxminddb Serious Memory Problems Resulting in DoS Risk
libmaxminddb 1.13.1 Re-release for Ubuntu PPA, no code changes. libmaxminddb 1.13.0 MMDB_get_entry_data_list() now validates that the claimed array/map size is plausible given the remaining bytes in the data section. A crafted database. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-1e497526c7 2026-03-13 00:58:40.063165+00:00 -------------------------------------------------------------------------------- Name : libmaxminddb Product : Fedora 42 Version : 1.13.1 Release : 1.fc42 URL : https://maxmind.github.io/libmaxminddb/ Summary : C library for reading MaxMind DB files Description : The libmaxminddb library provides a C library for reading MaxMind DB files, including the GeoIP2 databases from MaxMind. This is a custom binary format designed to facilitate fast lookups of IP addresses while allowing for great flexibility in the type of data associated with an address. The MaxMind DB format is an open file format. The specification is available at https://maxmind.github.io/MaxMind-DB/ and licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. -------------------------------------------------------------------------------- Update Information: libmaxminddb 1.13.1 Re-release for Ubuntu PPA, no code changes. libmaxminddb 1.13.0 MMDB_get_entry_data_list() now validates that the claimed array/map size is plausible given the remaining bytes in the data section. A crafted database could previously claim millions of array elements while only having a few bytes of data, causing disproportionate memory allocation (memory amplification DoS). Fixed integer overflow in MMDB_read_node() and find_ipv4_start_node() pointer arithmetic. The node_number * record_length multiplication was performed in uint32_t, which could overflow for very large databases. Now cast to uint64_t before multiplying, matching the pattern already used in find_address_in_search_tree(). Fixed printf format specifier mismatches in mmdblookup's metadata dump. %i was used for unsigned types and %llu for uint64_t, which is technically undefined behavior. Now uses the portable PRIu32, PRIu16, and PRIu64 macros from . Fixed an integer overflow in the search tree bounds check in find_address_in_search_tree(). The addition of node_count and data_section_size was performed in uint32_t arithmetic, which could wrap on very large databases, causing valid lookups to be incorrectly rejected as corrupt. Fixed a NULL pointer dereference in mmdblookup when displaying metadata for a database with an out-of-range build_epoch. The gmtime() return value is now checked before passing to strftime(). MMDB_close() now NULLs the file_content, data_section, and metadata_section pointers and zeroes file_size, data_section_size, and metadata_section_size after unmapping. Previously, calling MMDB_close() twice on the same struct (or calling it after a failed MMDB_open() that succeeded at mapping) would double-munmap the file content, which is undefined behavior. Fixed a stack buffer overflow in print_indentation() when MMDB_dump_entry_data_list() was called with a negative indent value. The negative integer was cast to size_t, producing a massive value passed to memset(). Negative indent values are now clamped to 0. MMDB_lookup_string() now sets *mmdb_error to MMDB_SUCCESS when getaddrinfo fails (non-zero *gai_error). Previously, *mmdb_error was left uninitialized in this case, which could cause callers to read an indeterminate value. Added a recursion depth limit to skip_map_or_array(), matching the existing MAXIMUM_DATA_STRUCTURE_DEPTH (512) limit already used by get_entry_data_list(). A crafted MMDB file with deeply nested maps or arrays could previously cause a stack overflow via unbounded recursion in the MMDB_aget_value / MMDB_get_value code path. Fixed an off-by-one error in MMDB_read_node() that allowedreading one node past the end of the search tree when called with node_number == node_count. This caused the function to read from the data section separator and return an invalid record with an underflowed data offset. The check now correctly rejects node_number > = node_count. The handling of float and double types was rewritten to fix compiler errors and to eliminate the use of volatile. Improved endian preprocessor check if MMDB_LITTLE_ENDIAN is not set. -------------------------------------------------------------------------------- ChangeLog: * Wed Feb 25 2026 Robert Scheck 1.13.1-1 - Upgrade to 1.13.1 (#2442507) * Fri Jan 16 2026 Fedora Release Engineering - 1.12.2-5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild * Thu Jul 24 2025 Fedora Release Engineering - 1.12.2-4 - Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild -------------------------------------------------------------------------------- References: [ 1 ] Bug #2442507 - libmaxminddb-1.13.1 is available https://bugzilla.redhat.com/show_bug.cgi?id=2442507 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-1e497526c7' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list --
Mar 13, 2026
•Important
Fedora
89
security advisorydenial of servicefedoraFedora 44 libmaxminddb Critical Memory Amplification DoS 2026-814fe58971
libmaxminddb 1.13.1 Re-release for Ubuntu PPA, no code changes. libmaxminddb 1.13.0 MMDB_get_entry_data_list() now validates that the claimed array/map size is plausible given the remaining bytes in the data section. A crafted database. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-814fe58971 2026-03-13 00:15:54.963620+00:00 -------------------------------------------------------------------------------- Name : libmaxminddb Product : Fedora 44 Version : 1.13.1 Release : 1.fc44 URL : https://maxmind.github.io/libmaxminddb/ Summary : C library for reading MaxMind DB files Description : The libmaxminddb library provides a C library for reading MaxMind DB files, including the GeoIP2 databases from MaxMind. This is a custom binary format designed to facilitate fast lookups of IP addresses while allowing for great flexibility in the type of data associated with an address. The MaxMind DB format is an open file format. The specification is available at https://maxmind.github.io/MaxMind-DB/ and licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. -------------------------------------------------------------------------------- Update Information: libmaxminddb 1.13.1 Re-release for Ubuntu PPA, no code changes. libmaxminddb 1.13.0 MMDB_get_entry_data_list() now validates that the claimed array/map size is plausible given the remaining bytes in the data section. A crafted database could previously claim millions of array elements while only having a few bytes of data, causing disproportionate memory allocation (memory amplification DoS). Fixed integer overflow in MMDB_read_node() and find_ipv4_start_node() pointer arithmetic. The node_number * record_length multiplication was performed in uint32_t, which could overflow for very large databases. Now cast to uint64_t before multiplying, matching the pattern already used in find_address_in_search_tree(). Fixed printf format specifier mismatches in mmdblookup's metadata dump. %i was used for unsigned types and %llu for uint64_t, which is technically undefined behavior. Now uses the portable PRIu32, PRIu16, and PRIu64 macros from . Fixed an integer overflow in the search tree bounds check in find_address_in_search_tree(). The addition of node_count and data_section_size was performed in uint32_t arithmetic, which could wrap on very large databases, causing valid lookups to be incorrectly rejected as corrupt. Fixed a NULL pointer dereference in mmdblookup when displaying metadata for a database with an out-of-range build_epoch. The gmtime() return value is now checked before passing to strftime(). MMDB_close() now NULLs the file_content, data_section, and metadata_section pointers and zeroes file_size, data_section_size, and metadata_section_size after unmapping. Previously, calling MMDB_close() twice on the same struct (or calling it after a failed MMDB_open() that succeeded at mapping) would double-munmap the file content, which is undefined behavior. Fixed a stack buffer overflow in print_indentation() when MMDB_dump_entry_data_list() was called with a negative indent value. The negative integer was cast to size_t, producing a massive value passed to memset(). Negative indent values are now clamped to 0. MMDB_lookup_string() now sets *mmdb_error to MMDB_SUCCESS when getaddrinfo fails (non-zero *gai_error). Previously, *mmdb_error was left uninitialized in this case, which could cause callers to read an indeterminate value. Added a recursion depth limit to skip_map_or_array(), matching the existing MAXIMUM_DATA_STRUCTURE_DEPTH (512) limit already used by get_entry_data_list(). A crafted MMDB file with deeply nested maps or arrays could previously cause a stack overflow via unbounded recursion in the MMDB_aget_value / MMDB_get_value code path. Fixed an off-by-one error in MMDB_read_node() that allowedreading one node past the end of the search tree when called with node_number == node_count. This caused the function to read from the data section separator and return an invalid record with an underflowed data offset. The check now correctly rejects node_number > = node_count. The handling of float and double types was rewritten to fix compiler errors and to eliminate the use of volatile. Improved endian preprocessor check if MMDB_LITTLE_ENDIAN is not set. -------------------------------------------------------------------------------- ChangeLog: * Wed Feb 25 2026 Robert Scheck 1.13.1-1 - Upgrade to 1.13.1 (#2442507) -------------------------------------------------------------------------------- References: [ 1 ] Bug #2442507 - libmaxminddb-1.13.1 is available https://bugzilla.redhat.com/show_bug.cgi?id=2442507 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-814fe58971' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list --
Mar 13, 2026
•Critical
Fedora
89
security advisoryfedoracriticalFedora 43 libmaxminddb 1.13.1 Severe Memory Amplification DoS Issue
libmaxminddb 1.13.1 Re-release for Ubuntu PPA, no code changes. libmaxminddb 1.13.0 MMDB_get_entry_data_list() now validates that the claimed array/map size is plausible given the remaining bytes in the data section. A crafted database. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-814a1deec8 2026-02-27 00:52:14.662439+00:00 -------------------------------------------------------------------------------- Name : libmaxminddb Product : Fedora 43 Version : 1.13.1 Release : 1.fc43 URL : https://maxmind.github.io/libmaxminddb/ Summary : C library for reading MaxMind DB files Description : The libmaxminddb library provides a C library for reading MaxMind DB files, including the GeoIP2 databases from MaxMind. This is a custom binary format designed to facilitate fast lookups of IP addresses while allowing for great flexibility in the type of data associated with an address. The MaxMind DB format is an open file format. The specification is available at https://maxmind.github.io/MaxMind-DB/ and licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. -------------------------------------------------------------------------------- Update Information: libmaxminddb 1.13.1 Re-release for Ubuntu PPA, no code changes. libmaxminddb 1.13.0 MMDB_get_entry_data_list() now validates that the claimed array/map size is plausible given the remaining bytes in the data section. A crafted database could previously claim millions of array elements while only having a few bytes of data, causing disproportionate memory allocation (memory amplification DoS). Fixed integer overflow in MMDB_read_node() and find_ipv4_start_node() pointer arithmetic. The node_number * record_length multiplication was performed in uint32_t, which could overflow for very large databases. Now cast to uint64_t before multiplying, matching the pattern already used in find_address_in_search_tree(). Fixed printf format specifier mismatches in mmdblookup's metadata dump. %i was used for unsigned types and %llu for uint64_t, which is technically undefined behavior. Now uses the portable PRIu32, PRIu16, and PRIu64 macros from . Fixed an integer overflow in the search tree bounds check in find_address_in_search_tree(). The addition of node_count and data_section_size was performed in uint32_t arithmetic, which could wrap on very large databases, causing valid lookups to be incorrectly rejected as corrupt. Fixed a NULL pointer dereference in mmdblookup when displaying metadata for a database with an out-of-range build_epoch. The gmtime() return value is now checked before passing to strftime(). MMDB_close() now NULLs the file_content, data_section, and metadata_section pointers and zeroes file_size, data_section_size, and metadata_section_size after unmapping. Previously, calling MMDB_close() twice on the same struct (or calling it after a failed MMDB_open() that succeeded at mapping) would double-munmap the file content, which is undefined behavior. Fixed a stack buffer overflow in print_indentation() when MMDB_dump_entry_data_list() was called with a negative indent value. The negative integer was cast to size_t, producing a massive value passed to memset(). Negative indent values are now clamped to 0. MMDB_lookup_string() now sets *mmdb_error to MMDB_SUCCESS when getaddrinfo fails (non-zero *gai_error). Previously, *mmdb_error was left uninitialized in this case, which could cause callers to read an indeterminate value. Added a recursion depth limit to skip_map_or_array(), matching the existing MAXIMUM_DATA_STRUCTURE_DEPTH (512) limit already used by get_entry_data_list(). A crafted MMDB file with deeply nested maps or arrays could previously cause a stack overflow via unbounded recursion in the MMDB_aget_value / MMDB_get_value code path. Fixed an off-by-one error in MMDB_read_node() that allowedreading one node past the end of the search tree when called with node_number == node_count. This caused the function to read from the data section separator and return an invalid record with an underflowed data offset. The check now correctly rejects node_number > = node_count. The handling of float and double types was rewritten to fix compiler errors and to eliminate the use of volatile. Improved endian preprocessor check if MMDB_LITTLE_ENDIAN is not set. -------------------------------------------------------------------------------- ChangeLog: * Wed Feb 25 2026 Robert Scheck 1.13.1-1 - Upgrade to 1.13.1 (#2442507) * Fri Jan 16 2026 Fedora Release Engineering - 1.12.2-5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild -------------------------------------------------------------------------------- References: [ 1 ] Bug #2442507 - libmaxminddb-1.13.1 is available https://bugzilla.redhat.com/show_bug.cgi?id=2442507 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-814a1deec8' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list --
Feb 27, 2026
•Critical
Fedora
217
security advisorymoderatesecurity updateOracle Linux 8 ELSA-2024-0769 Important: Libxml2 Security Fix
The following updated rpms for Oracle Linux 8 have been uploaded to the Unbreakable Linux Network: . Oracle Linux Security Advisory ELSA-2024-0768 https://linux.oracle.com/errata/ELSA-2024-0768.html The following updated rpms for Oracle Linux 8 have been uploaded to the Unbreakable Linux Network: x86_64: libmaxminddb-1.2.0-10.el8_9.1.i686.rpm libmaxminddb-1.2.0-10.el8_9.1.x86_64.rpm libmaxminddb-devel-1.2.0-10.el8_9.1.i686.rpm libmaxminddb-devel-1.2.0-10.el8_9.1.x86_64.rpm aarch64: libmaxminddb-1.2.0-10.el8_9.1.aarch64.rpm libmaxminddb-devel-1.2.0-10.el8_9.1.aarch64.rpm SRPMS: https://oss.oracle.com:443/ol8/SRPMS-updates//libmaxminddb-1.2.0-10.el8_9.1.src.rpm Related CVEs: CVE-2020-28241 Description of changes: [1.2.0-10.1] - Resolves: RHEL-20594 - improper initialization in dump_entry_data_list() in maxminddb.c _______________________________________________ El-errata mailing list
Feb 13, 2024
•Important
Oracle
203
security advisorycriticalbuffer issueMageia 7 MGASA-2020-0471 Critical: libmaxminddb Heap Overread
libmaxminddb before 1.4.3 has a heap-based buffer over-read in dump_entry_data_list in maxminddb.c (CVE-2020-28241). References: - https://bugs.mageia.org/show_bug.cgi?id=27608 . MGASA-2020-0471 - Updated libmaxminddb packages fix security vulnerability Publication date: 28 Dec 2020 URL: https://advisories.mageia.org/MGASA-2020-0471.html Type: security Affected Mageia releases: 7 CVE: CVE-2020-28241 libmaxminddb before 1.4.3 has a heap-based buffer over-read in dump_entry_data_list in maxminddb.c (CVE-2020-28241). References: - https://bugs.mageia.org/show_bug.cgi?id=27608 - https://lists.debian.org/debian-lts-announce/2020/11/msg00019.html - https://ubuntu.com/security/notices/USN-4631-1 - https://lists.fedoraproject.org/archives/list/
Dec 28, 2020
•Critical
Mageia
89
security advisorysecurity issueupdateFedora 33: FEDORA-2020-8a8f8b244f Critical Issue with libmaxminddb Init
New version 1.4.3. Security fix for CVE-2020-28241.. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2020-8a8f8b244f 2020-12-26 01:36:12.488305 --------------------------------------------------------------------------------Name : libmaxminddb Product : Fedora 33 Version : 1.4.3 Release : 1.fc33 URL : https://maxmind.github.io/libmaxminddb/ Summary : C library for the MaxMind DB file format Description : The package contains libmaxminddb library. --------------------------------------------------------------------------------Update Information: New version 1.4.3. Security fix for CVE-2020-28241. --------------------------------------------------------------------------------ChangeLog: * Thu Dec 10 2020 Michal Ruprich - 1.4.3-1 - Update to 1.4.3 - Resolves: #1758843 - libmaxminddb-devel i686 can't be installed in parallel to x86_64 - Fix for CVE-2020-28241 --------------------------------------------------------------------------------References: [ 1 ] Bug #1895379 - CVE-2020-28241 libmaxminddb: improper initialization in dump_entry_data_list() in maxminddb.c https://bugzilla.redhat.com/show_bug.cgi?id=1895379 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2020-8a8f8b244f' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/security/ --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list --
Dec 25, 2020
•Critical
Fedora
89
security advisoryhigh severityfedoraFedora 32 Update: FEDORA-2020-1fb1785fa1 High Severity Security Fix
New version 1.4.3. Security fix for CVE-2020-28241.. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2020-1fb1785fa1 2020-12-26 01:18:31.225513 --------------------------------------------------------------------------------Name : libmaxminddb Product : Fedora 32 Version : 1.4.3 Release : 1.fc32 URL : https://maxmind.github.io/libmaxminddb/ Summary : C library for the MaxMind DB file format Description : The package contains libmaxminddb library. --------------------------------------------------------------------------------Update Information: New version 1.4.3. Security fix for CVE-2020-28241. --------------------------------------------------------------------------------ChangeLog: * Thu Dec 10 2020 Michal Ruprich - 1.4.3-1 - Update to 1.4.3 - Resolves: #1758843 - libmaxminddb-devel i686 can't be installed in parallel to x86_64 - Fix for CVE-2020-28241 --------------------------------------------------------------------------------References: [ 1 ] Bug #1895379 - CVE-2020-28241 libmaxminddb: improper initialization in dump_entry_data_list() in maxminddb.c https://bugzilla.redhat.com/show_bug.cgi?id=1895379 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2020-1fb1785fa1' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/security/ --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list --
Dec 25, 2020
Fedora
91
security advisorydenial of servicegentooGentoo: GLSA-202101-20 Normal: libmaxminddb Security Flaw Detected
A vulnerability in libmaxminddb could lead to a Denial of Service condition.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202011-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: libmaxminddb: Denial of service Date: November 14, 2020 Bugs: #753275 ID: 202011-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= A vulnerability in libmaxminddb could lead to a Denial of Service condition. Background ========= The libmaxminddb library provides a C library for reading MaxMind DB files, including the GeoIP2 databases from MaxMind. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/libmaxminddb < 1.4.3 > = 1.4.3 Description ========== libmaxminddb used uninitialised memory when reading from a corrupt database file. Impact ===== A remote attacker could entice a user to use a specially crafted database with libmaxminddb, possibly resulting in a Denial of Service condition. Workaround ========= There is no known workaround at this time. Resolution ========= All libmaxminddb users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =dev-libs/libmaxminddb-1.4.3" References ========= [ 1 ] CVE-2020-28241 https://nvd.nist.gov/vuln/detail/CVE-2020-28241 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202011-15 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuringthe confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to
Nov 14, 2020
Gentoo
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