| Name | CVE-2021-3998 |
| Description | A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| glibc (PTS) | bullseye | 2.31-13+deb11u11 | fixed |
| bullseye (security) | 2.31-13+deb11u10 | fixed |
| bookworm | 2.36-9+deb12u9 | fixed |
| bookworm (security) | 2.36-9+deb12u7 | fixed |
| sid, trixie | 2.40-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| glibc | source | stretch | (not affected) | | | |
| glibc | source | buster | (not affected) | | | |
| glibc | source | bullseye | (not affected) | | | |
| glibc | source | (unstable) | 2.33-4 | | | |
Notes
[bullseye] - glibc <not-affected> (Vulnerable code introduced later)
[buster] - glibc <not-affected> (Vulnerable code introduced later)
[stretch] - glibc <not-affected> (Vulnerable code introduced later)
https://sourceware.org/bugzilla/show_bug.cgi?id=28770
https://patchwork.sourceware.org/project/glibc/patch/20220113055920.3155918-1-siddhesh@sourceware.org/
https://www.openwall.com/lists/oss-security/2022/01/24/4
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ee8d5e33adb284601c00c94687bc907e10aec9bb
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f7a79879c0b2bef0dadd6caaaeeb0d26423e04e5
introduced in 2.33 by: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c6e0b0b5b0b7922cdf0dce2af671e0c7e500df95