| Name | CVE-2021-29470 |
| Description | Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. An out-of-bounds read was found in Exiv2 versions v0.27.3 and earlier. The out-of-bounds read is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service by crashing Exiv2, 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) |
| Debian Bugs | 987450 |
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 | vulnerable | |
| 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 | (not affected) | |||
| exiv2 | source | buster | (not affected) | |||
| exiv2 | source | bullseye | 0.27.3-3+deb11u2 | |||
| exiv2 | source | (unstable) | 0.27.5-1 | 987450 |
[buster] - exiv2 <not-affected> (Jp2Image::encodeJp2Header added in 0.26)
[stretch] - exiv2 <not-affected> (Vulnerable code introduced later)
https://github.com/Exiv2/exiv2/security/advisories/GHSA-8949-hhfh-j7rj
https://github.com/Exiv2/exiv2/pull/1581
https://github.com/Exiv2/exiv2/commit/b3de96f4b4408347bed57e625963720e8d0dd2ea
https://github.com/Exiv2/exiv2/commit/c372f2677d6f7cf88a8f26ef6bc175561e406ee2