| Name | CVE-2023-4527 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1051958 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| glibc (PTS) | buster | 2.28-10+deb10u1 | fixed |
| buster (security) | 2.28-10+deb10u2 | fixed | |
| bullseye | 2.31-13+deb11u8 | fixed | |
| bullseye (security) | 2.31-13+deb11u9 | fixed | |
| bookworm | 2.36-9+deb12u4 | fixed | |
| bookworm (security) | 2.36-9+deb12u6 | fixed | |
| trixie | 2.37-18 | fixed | |
| sid | 2.37-19 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| glibc | source | buster | (not affected) | |||
| glibc | source | bullseye | (not affected) | |||
| glibc | source | bookworm | 2.36-9+deb12u3 | |||
| glibc | source | (unstable) | 2.37-9 | 1051958 |
[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