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Vulnerability · Published Aug 9, 2021 · Assigned by GitHub_M

CVE-2021-37621Denial of service due to infinite loop in Image::printIFDStructure

Medium 5.5

In plain English

A medium-severity infinite loop 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 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)1.1%top 34.1% 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 infinite loop was found in Exiv2 versions v0.27.4 and earlier. The infinite loop is triggered when Exiv2 is used to print the metadata of a crafted image file. An attacker could potentially exploit the vulnerability to cause a denial of service, if they can trick the victim into running Exiv2 on a crafted image file. Note that this bug is only triggered when printing the image ICC profile, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p C`). The bug is fixed in version v0.27.5.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20exiv20.27.5-r0ALPINE-CVE-2021-37621
Alpine:v3.21exiv20.27.5-r0ALPINE-CVE-2021-37621
Alpine:v3.22exiv20.27.5-r0ALPINE-CVE-2021-37621
Alpine:v3.23exiv20.27.5-r0ALPINE-CVE-2021-37621
Alpine:v3.24exiv20.27.5-r0ALPINE-CVE-2021-37621
Debian:12exiv20.27.5-1DEBIAN-CVE-2021-37621
Debian:13exiv20.27.5-1DEBIAN-CVE-2021-37621
Debian:14exiv20.27.5-1DEBIAN-CVE-2021-37621
Ubuntu:22.04:LTSexiv20.27.3-3ubuntu4UBUNTU-CVE-2021-37621

Affected products (as reported)

VendorProductVersions
Exiv2 exiv2 <= 0.27.4

Weakness: CWE-835 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References