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Red Hat 8 RHSA-2021-1853 Moderate: Unbound Denial Of Service Issues

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
A significant enhancement for unbound is now accessible on Red Hat Enterprise Linux 8, incorporating critical security improvements and issue resolutions.
An update for unbound is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.
Security Fix(es):
* unbound: integer overflow in the regional allocator via regional_alloc (CVE-2019-25032)
* unbound: integer overflow in sldns_str2wire_dname_buf_origin can lead to an out-of-bounds write (CVE-2019-25034)
* unbound: out-of-bounds write in sldns_bget_token_par (CVE-2019-25035)
* unbound: assertion failure and denial of service in synth_cname (CVE-2019-25036)
* unbound: assertion failure and denial of service in dname_pkt_copy via an invalid packet (CVE-2019-25037)
* unbound: integer overflow in a size calculation in dnscrypt/dnscrypt.c (CVE-2019-25038)
* unbound: integer overflow in a size calculation in respip/respip.c (CVE-2019-25039)
* unbound: infinite loop via a compressed name in dname_pkt_copy (CVE-2019-25040)
* unbound: assertion failure via a compressed name in dname_pkt_copy (CVE-2019-25041)
* unbound: out-of-bounds write via a compressed name in rdata_copy (CVE-2019-25042)
* unbound: symbolic link traversal when writing PID file (CVE-2020-28935)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate denial of service security issue bug fix security fix Red Hat Enterprise Linux moderate impact red hat enterprise linux dos out-of-bounds unbound

References

https://access.redhat.com/security/cve/CVE-2019-25032 https://access.redhat.com/security/cve/CVE-2019-25034 https://access.redhat.com/security/cve/CVE-2019-25035 https://access.redhat.com/security/cve/CVE-2019-25036 https://access.redhat.com/security/cve/CVE-2019-25037 https://access.redhat.com/security/cve/CVE-2019-25038 https://access.redhat.com/security/cve/CVE-2019-25039 https://access.redhat.com/security/cve/CVE-2019-25040 https://access.redhat.com/security/cve/CVE-2019-25041 https://access.redhat.com/security/cve/CVE-2019-25042 https://access.redhat.com/security/cve/CVE-2020-28935 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: unbound-1.7.3-15.el8.src.rpm
aarch64: python3-unbound-1.7.3-15.el8.aarch64.rpm python3-unbound-debuginfo-1.7.3-15.el8.aarch64.rpm unbound-1.7.3-15.el8.aarch64.rpm unbound-debuginfo-1.7.3-15.el8.aarch64.rpm unbound-debugsource-1.7.3-15.el8.aarch64.rpm unbound-devel-1.7.3-15.el8.aarch64.rpm unbound-libs-1.7.3-15.el8.aarch64.rpm unbound-libs-debuginfo-1.7.3-15.el8.aarch64.rpm
ppc64le: python3-unbound-1.7.3-15.el8.ppc64le.rpm python3-unbound-debuginfo-1.7.3-15.el8.ppc64le.rpm unbound-1.7.3-15.el8.ppc64le.rpm unbound-debuginfo-1.7.3-15.el8.ppc64le.rpm unbound-debugsource-1.7.3-15.el8.ppc64le.rpm unbound-devel-1.7.3-15.el8.ppc64le.rpm unbound-libs-1.7.3-15.el8.ppc64le.rpm unbound-libs-debuginfo-1.7.3-15.el8.ppc64le.rpm
s390x: python3-unbound-1.7.3-15.el8.s390x.rpm python3-unbound-debuginfo-1.7.3-15.el8.s390x.rpm unbound-1.7.3-15.el8.s390x.rpm unbound-debuginfo-1.7.3-15.el8.s390x.rpm unbound-debugsource-1.7.3-15.el8.s390x.rpm unbound-devel-1.7.3-15.el8.s390x.rpm unbound-libs-1.7.3-15.el8.s390x.rpm unbound-libs-debuginfo-1.7.3-15.el8.s390x.rpm
x86_64: python3-unbound-1.7.3-15.el8.x86_64.rpm python3-unbound-debuginfo-1.7.3-15.el8.i686.rpm python3-unbound-debuginfo-1.7.3-15.el8.x86_64.rpm unbound-1.7.3-15.el8.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:1853-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1853
Issue date: 2021-05-18

Topic

An update for unbound is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate denial of service security issue bug fix security fix Red Hat Enterprise Linux moderate impact red hat enterprise linux dos out-of-bounds unbound

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1714175 - Fix SPEC file to not check md5 mtime and size of /var/lib/unbound/root.key

1842837 - rpmlint reports crypto-policy-non-compliance-openssl

1850460 - Enable additional logging in unbound in RHEL8

1878761 - CVE-2020-28935 unbound: symbolic link traversal when writing PID file

1954772 - CVE-2019-25032 unbound: integer overflow in the regional allocator via regional_alloc

1954778 - CVE-2019-25034 unbound: integer overflow in sldns_str2wire_dname_buf_origin can lead to an out-of-bounds write

1954780 - CVE-2019-25035 unbound: out-of-bounds write in sldns_bget_token_par

1954782 - CVE-2019-25036 unbound: assertion failure and denial of service in synth_cname

1954794 - CVE-2019-25037 unbound: assertion failure and denial of service in dname_pkt_copy via an invalid packet

1954796 - CVE-2019-25038 unbound: integer overflow in a size calculation in dnscrypt/dnscrypt.c

1954797 - CVE-2019-25039 unbound: integer overflow in a size calculation in respip/respip.c

1954799 - CVE-2019-25040 unbound: infinite loop via a compressed name in dname_pkt_copy

1954801 - CVE-2019-25041 unbound: assertion failure via a compressed name in dname_pkt_copy

1954804 - CVE-2019-25042 unbound: out-of-bounds write via a compressed name in rdata_copy

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