CVE-2023-4527

NameCVE-2023-4527
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1051958

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
glibc (PTS)buster2.28-10+deb10u1fixed
buster (security)2.28-10+deb10u2fixed
bullseye2.31-13+deb11u8fixed
bullseye (security)2.31-13+deb11u7fixed
bookworm, bookworm (security)2.36-9+deb12u4fixed
trixie2.37-15fixed
sid2.37-15.1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
glibcsourcebuster(not affected)
glibcsourcebullseye(not affected)
glibcsourcebookworm2.36-9+deb12u3
glibcsource(unstable)2.37-91051958

Notes

[bullseye] - glibc <not-affected> (Vulnerable code not present)
[buster] - glibc <not-affected> (Vulnerable code not present)
https://sourceware.org/bugzilla/show_bug.cgi?id=30842
Introduced by: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=f282cdbe7f436c75864e5640a409a10485e9abb2 (glibc-2.36)
Fixed by: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4ea972b7edd7e36610e8cde18bf7a8149d7bac4f (release/2.36/master branch)
Fixed by: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b7529346025a130fee483d42178b5c118da971bb (release/2.37/master branch)
Fixed by: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b25508dd774b617f99419bdc3cf2ace4560cd2d6 (release/2.38/master branch)
https://www.openwall.com/lists/oss-security/2023/09/25/1
https://sourceware.org/cgit/glibc/tree/advisories/GLIBC-SA-2023-0002

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