Use After Free Affecting glibc package, versions <2.23-0ubuntu11.3+esm5
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Test your applications- Snyk ID SNYK-UBUNTU1604-GLIBC-5901490
- published 8 Dec 2023
- disclosed 18 Sep 2023
Introduced: 18 Sep 2023
CVE-2023-4806 Open this link in a new tabHow to fix?
Upgrade Ubuntu:16.04
glibc
to version 2.23-0ubuntu11.3+esm5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream glibc
package and not the glibc
package as distributed by Ubuntu
.
See How to fix?
for Ubuntu:16.04
relevant fixed versions and status.
A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the nss_gethostbyname2_r and nss_getcanonname_r hooks without implementing the nss*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2023-4806
- https://access.redhat.com/security/cve/CVE-2023-4806
- https://bugzilla.redhat.com/show_bug.cgi?id=2237782
- http://www.openwall.com/lists/oss-security/2023/10/03/4
- http://www.openwall.com/lists/oss-security/2023/10/03/5
- http://www.openwall.com/lists/oss-security/2023/10/03/6
- http://www.openwall.com/lists/oss-security/2023/10/03/8
- https://security.gentoo.org/glsa/202310-03
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/
- https://access.redhat.com/errata/RHSA-2023:5453
- https://access.redhat.com/errata/RHSA-2023:5455
- https://access.redhat.com/errata/RHSA-2023:7409
- https://security.netapp.com/advisory/ntap-20240125-0008/