| Name | CVE-2021-29457 |
| Description | Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. A heap buffer overflow was found in Exiv2 versions v0.27.3 and earlier. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when _writing_ the metadata, which is a less frequently used Exiv2 operation than _reading_ the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `insert`. The bug is fixed in version v0.27.4. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2750-1, DSA-4958-1 |
| Debian Bugs | 991705 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| exiv2 (PTS) | 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 | stretch | 0.25-3.1+deb9u3 | DLA-2750-1 | ||
| exiv2 | source | buster | 0.25-4+deb10u2 | DSA-4958-1 | ||
| exiv2 | source | bullseye | 0.27.3-3+deb11u1 | |||
| exiv2 | source | (unstable) | 0.27.3-3.1 | 991705 |
https://github.com/Exiv2/exiv2/security/advisories/GHSA-v74w-h496-cgqm
https://github.com/Exiv2/exiv2/issues/1529
https://github.com/Exiv2/exiv2/pull/1534
https://github.com/Exiv2/exiv2/commit/13e5a3e02339b746abcaee6408893ca2fd8e289d
buster-security and bullseye-security updates refer to CVE-2021-31291, which
was an addditional (and then rejected) CVE ID for the same issue as CVE-2021-29457