PT-2021-24329 · Libbpf+4 · Libbpf+4

Published 2021-12-31 · Updated 2024-07-01 · CVE-2021-45940

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: libbpf versions 0.6.0 through 0.6.1

Description: The issue is a heap-based buffer overflow of 4 bytes in the bpf object open function, which is called from bpf object open mem and bpf-object-fuzzer.c. This overflow can potentially lead to memory corruption and other security issues.

Recommendations: For libbpf versions 0.6.0 and 0.6.1, consider applying a patch or updating to a version where this issue is fixed, if available. As a temporary workaround, consider restricting access to the bpf object open function until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2022-1956

BIT-BPFTOOL-2021-45940

CVE-2021-45940

OPENSUSE-SU-2024:12491-1

USN-5759-1

Affected Products

Alt Linux

Debian

Linuxmint

Ubuntu

Libbpf

References · 16

• 🔥 https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libbpf/OSV-2021-1562.yaml · Exploit
• 🔥 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40868 · Exploit
• https://ubuntu.com/security/CVE-2021-45941 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-45940 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3534 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3533 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-bpftool-2021-45940 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-45940 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5759-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-45940 · Security Note
• https://ubuntu.com/security/CVE-2022-3606 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-45940 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-45940 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5759-1 · Vendor Advisory
• https://twitter.com/shunghsiyu/status/1731635634270519468 · Twitter Post