CVE-2021-29458
Out-of-bounds read in Exiv2::Internal::CrwMap::encode
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Timeline
ID reserved
By GitHub_M
- 20 days later
· 20 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.6% · top 25% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
References (7)
- https://github.com/Exiv2/exiv2/issues/1530 (opens in a new tab)x_transferred
- https://github.com/Exiv2/exiv2/security/advisories/GHSA-57jj-75fm-9rq5 (opens in a new tab)x_transferred
- https://github.com/Exiv2/exiv2/pull/1536 (opens in a new tab)x_transferred
- FEDORA-2021-10d7331a31 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-be94728b95 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20230110 [SECURITY] [DLA 3265-1] exiv2 security update (opens in a new tab)mailing-listx_transferred
- GLSA-202312-06 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-29458)Record last updated .