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Mageia 8 MGASA-2022-0374 Moderate: ISC DHCP Memory Overflow Risk

In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to . MGASA-2022-0374 - Updated dhcp packages fix security vulnerability Publication date: 18 Oct 2022 URL: https://advisories.mageia.org/MGASA-2022-0374.html Type: security Affected Mageia releases: 8 CVE: CVE-2022-2928, CVE-2022-2929 In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort. (CVE-2022-2928) In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory. (CVE-2022-2929) References: - https://bugs.mageia.org/show_bug.cgi?id=30942 - https://kb.isc.org/docs/cve-2022-2928 - https://kb.isc.org/docs/cve-2022-2929 - https://www.openwall.com/lists/oss-security/2022/10/05/1 - https://ubuntu.com/security/notices/USN-5658-1 - https://www.cve.org/CVERecord?id=CVE-2022-2928 - https://www.cve.org/CVERecord?id=CVE-2022-2929 SRPMS: - 8/core/dhcp-4.4.2-10.2.mga8 . The MGASA-2022-0456 patch tackles urgent vulnerabilities in OpenSSH, boosting client resilience against network attacks.. ISCDhcpUpdate,MageiaSecurityPatch,OptionReferenceFix,MemoryOverflowIssue. . LinuxSecurity.com Team

Oct 18, 2022 Mageia