| Name | CVE-2020-18831 |
| Description | Buffer Overflow vulnerability in tEXtToDataBuf function in pngimage.cpp in Exiv2 0.27.1 allows remote attackers to cause a denial of service and other unspecified impacts via use of crafted file. |
| 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 |
|---|
| exiv2 (PTS) | jessie, jessie (lts) | 0.24-4.1+deb8u7 | fixed |
| stretch (security) | 0.25-3.1+deb9u3 | fixed |
| stretch (lts), stretch | 0.25-3.1+deb9u4 | fixed |
| buster (security), buster, buster (lts) | 0.25-4+deb10u4 | fixed |
| bullseye | 0.27.3-3+deb11u2 | fixed |
| bullseye (security) | 0.27.3-3+deb11u1 | fixed |
| bookworm | 0.27.6-1 | fixed |
| sid, trixie | 0.28.3+dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| exiv2 | source | jessie | (not affected) | | | |
| exiv2 | source | stretch | (not affected) | | | |
| exiv2 | source | buster | (not affected) | | | |
| exiv2 | source | (unstable) | 0.27.2-6 | | | |
Notes
[buster] - exiv2 <not-affected> (Vulnerable code introduced later)
https://github.com/Exiv2/exiv2/issues/828
https://github.com/Exiv2/exiv2/pull/862
Introduced by: https://github.com/Exiv2/exiv2/commit/4617dc37284bb14c15fb884a7252de7c2b8b8854
Fixed by: https://github.com/Exiv2/exiv2/commit/6068df4c01ce915befb763bd0fd718d16a5df130 (v0.27.2-RC1)
[stretch] - exiv2 <not-affected> (Vulnerable code introduced later)
[jessie] - exiv2 <not-affected> (Vulnerable code introduced later)