PT-2022-6903 · Libsolv+1 · Libsolv+1

Yangjiageng · Published 2022-02-21 · Updated 2022-07-05 · CVE-2021-44568

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions libsolv versions prior to 13 Dec 2020

Description The issue is related to two heap-overflow vulnerabilities in the decisionmap variable via the resolve dependencies function at src/solver.c (line 1940 and line 1995), which could cause a remote Denial of Service. This vulnerability is associated with a buffer overflow in memory, allowing a remote attacker to cause a service disruption.

Recommendations For versions prior to 13 Dec 2020, as a temporary workaround, consider disabling the resolve dependencies function until a patch is available. Restrict access to the decisionmap variable to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2023-05482

CVE-2021-44568

OESA-2022-1569

RHSA-2022:5498

RLSA-2022:5498

Affected Products

Rocky Linux

Libsolv

References · 501

• 🔥 https://github.com/openSUSE/libsolv/issues/425 · Exploit
• 🔥 https://github.com/yangjiageng/PoC/blob/master/libsolv-PoCs/resolve_dependencies-1940 · Exploit
• 🔥 https://github.com/yangjiageng/PoC/blob/master/libsolv-PoCs/resolve_dependencies-1995 · Exploit
• https://osv.dev/vulnerability/CVE-2021-44568 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44568 · Security Note
• https://errata.rockylinux.org/RLSA-2022:5498 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44569 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-44574 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-44568 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44577 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-44568 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-44571 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-44568 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-44575 · Security Note
• https://osv.dev/vulnerability/RLSA-2022:5498 · Vendor Advisory