| Name | CVE-2021-42716 |
| Description | An issue was discovered in stb stb_image.h 2.27. The PNM loader incorrectly interpreted 16-bit PGM files as 8-bit when converting to RGBA, leading to a buffer overflow when later reinterpreting the result as a 16-bit buffer. An attacker could potentially have crashed a service using stb_image, or read up to 1024 bytes of non-consecutive heap data without control over the read location. |
| 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 | 1014532 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libstb (PTS) | buster | 0.0~git20180212.15.e6afb9c-1 | fixed |
| buster (security) | 0.0~git20180212.15.e6afb9c-1+deb10u1 | fixed |
| bullseye | 0.0~git20200713.b42009b+ds-1 | fixed |
| bookworm | 0.0~git20220908.8b5f1f3+ds-1 | vulnerable |
| trixie | 0.0~git20230129.5736b15+ds-1 | fixed |
| sid | 0.0~git20230129.5736b15+ds-1.2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libstb | source | buster | (not affected) | | | |
| libstb | source | bullseye | (not affected) | | | |
| libstb | source | (unstable) | 0.0~git20230129.5736b15+ds-1 | | | 1014532 |
Notes
[bookworm] - libstb <no-dsa> (Minor issue)
[bullseye] - libstb <not-affected> (Vulnerable code introduced later)
[buster] - libstb <not-affected> (Vulnerable code introduced later)
https://github.com/nothings/stb/issues/1166
https://github.com/nothings/stb/issues/1225
https://github.com/nothings/stb/pull/1223
16-bin PNM support was added in
https://github.com/nothings/stb/commit/8befa752b005da174b2429c1ffaafffe452b2997