CVE-2022-20785

On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2 and earlier was disclosed: A vulnerability in HTML file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional information becomes available.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

Affected Software

Name	Vendor	Start Version	End Version
Clamav	Clamav	*	0.103.5 (excluding)
Clamav	Clamav	*	0.103.5 (including)
Clamav	Clamav	0.104.0 (including)	0.104.2 (excluding)
Clamav	Ubuntu	bionic	*
Clamav	Ubuntu	devel	*
Clamav	Ubuntu	esm-infra/xenial	*
Clamav	Ubuntu	focal	*
Clamav	Ubuntu	impish	*
Clamav	Ubuntu	jammy	*
Clamav	Ubuntu	kinetic	*
Clamav	Ubuntu	trusty/esm	*
Clamav	Ubuntu	upstream	*

Potential Mitigations

Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
For example, glibc in Linux provides protection against free of invalid pointers.
When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2022-20785
CWE	https://cwe.mitre.org/data/definitions/401.html

Missing Release of Memory after Effective Lifetime

Weakness

Affected Software

Potential Mitigations

References