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Vulnerability · Published Aug 9, 2021 · Assigned by GitHub_M

CVE-2021-37616Null pointer dereference in Exiv2::Internal::resolveLens0x8ff

Medium 5.5

In plain English

A medium-severity null pointer dereference 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 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)1.0%top 36.0% 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. A null pointer dereference was found in Exiv2 versions v0.27.4 and earlier. The null pointer dereference 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 interpreted (translated) data, which is a less frequently used Exiv2 operation that requires an extra command line option (`-p t` or `-P t`). The bug is fixed in version v0.27.5.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20exiv20.27.5-r0ALPINE-CVE-2021-37616
Alpine:v3.21exiv20.27.5-r0ALPINE-CVE-2021-37616
Alpine:v3.22exiv20.27.5-r0ALPINE-CVE-2021-37616
Alpine:v3.23exiv20.27.5-r0ALPINE-CVE-2021-37616
Alpine:v3.24exiv20.27.5-r0ALPINE-CVE-2021-37616
Debian:12exiv20.27.5-1DEBIAN-CVE-2021-37616
Debian:13exiv20.27.5-1DEBIAN-CVE-2021-37616
Debian:14exiv20.27.5-1DEBIAN-CVE-2021-37616
Ubuntu:22.04:LTSexiv20.27.3-3ubuntu4UBUNTU-CVE-2021-37616

Affected products (as reported)

VendorProductVersions
Exiv2 exiv2 <= 0.27.4

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References