A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-4527
• https://access.redhat.com/security/cve/CVE-2023-4527
• https://bugzilla.redhat.com/show_bug.cgi?id=2234712
• http://www.openwall.com/lists/oss-security/2023/09/25/1
• 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://security.netapp.com/advisory/ntap-20231116-0012/