CVE-2023-4527

Summary

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.

Affected Software

Weaknesses

• CWE-121: Stack-based Buffer Overflow

Workarounds

Removing the no-aaaa diagnostic option from /etc/resolv.conf will mitigate this flaw.

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2023/09/25/1
• https://access.redhat.com/errata/RHSA-2023:5453
• https://access.redhat.com/errata/RHSA-2023:5455
• https://access.redhat.com/security/cve/CVE-2023-4527
• https://bugzilla.redhat.com/show_bug.cgi?id=2234712
• 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/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/
• https://security.gentoo.org/glsa/202310-03
• https://security.netapp.com/advisory/ntap-20231116-0012/

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://cert-portal.siemens.com/productcert/html/ssa-831302.html
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html

References

• https://access.redhat.com/errata/RHSA-2023:5453
• https://access.redhat.com/errata/RHSA-2023:5455
• https://access.redhat.com/security/cve/CVE-2023-4527
• https://bugzilla.redhat.com/show_bug.cgi?id=2234712

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