Out-of-bounds write in libsolv - CVE-2021-33938

Vulnerability identifier: #VU66436

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-33938

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: SUSE

Affected software:
libsolv

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing untrusted input within the prune_to_recommended(0 function in src/policy.c. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger an out-of-bounds write and crash the application.

Install updates from vendor's website.

• https://github.com/openSUSE/libsolv/issues/420