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Vulnerability · Published Apr 19, 2021 · Assigned by GitHub_M

CVE-2021-29458Out-of-bounds read in Exiv2::Internal::CrwMap::encode

Medium 5.5

In plain English

A medium-severity out-of-bounds read in exiv2 from Exiv2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)1.6%top 24.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8exiv20.27.4-5.el8ALSA-2021:4173
AlmaLinux:8exiv2-devel0.27.4-5.el8ALSA-2021:4173
AlmaLinux:8exiv2-doc0.27.4-5.el8ALSA-2021:4173
AlmaLinux:8exiv2-libs0.27.4-5.el8ALSA-2021:4173
Alpine:v3.20exiv20.27.3-r1ALPINE-CVE-2021-29458
Alpine:v3.21exiv20.27.3-r1ALPINE-CVE-2021-29458
Alpine:v3.22exiv20.27.3-r1ALPINE-CVE-2021-29458
Alpine:v3.23exiv20.27.3-r1ALPINE-CVE-2021-29458
Alpine:v3.24exiv20.27.3-r1ALPINE-CVE-2021-29458
Debian:12exiv20.27.5-1DEBIAN-CVE-2021-29458
Debian:13exiv20.27.5-1DEBIAN-CVE-2021-29458
Debian:14exiv20.27.5-1DEBIAN-CVE-2021-29458
Rocky Linux:8exiv20:0.27.4-5.el8RLSA-2021:4173

Affected products (as reported)

VendorProductVersions
Exiv2 exiv2 < 0.27.4

Weakness: CWE-125

References