CVE-2021-45940 : libbpf 0.6.0 and 0.6.1 has a heap-based buffer overflow (4 bytes) in __bpf

libbpf 0.6.0 and 0.6.1 has a heap-based buffer overflow (4 bytes) in __bpf_object__open (called from bpf_object__open_mem and bpf-object-fuzzer.c).

Published 2022-01-01 01:15:09

Updated 2022-01-11 18:20:26

Source MITRE

View at NVD, CVE.org

Vulnerability category: OverflowMemory Corruption

Products affected by CVE-2021-45940

Libbpf Project » Libbpf » Version: 0.6.0
cpe:2.3:a:libbpf_project:libbpf:0.6.0:*:*:*:*:*:*:*
Matching versions
Libbpf Project » Libbpf » Version: 0.6.1
cpe:2.3:a:libbpf_project:libbpf:0.6.1:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.11%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 45 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	2.8	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40868

40868 - libbpf:bpf-object-fuzzer: Heap-buffer-overflow in __bpf_object__open - oss-fuzz
Exploit;Issue Tracking;Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libbpf/OSV-2021-1562.yaml

oss-fuzz-vulns/OSV-2021-1562.yaml at main · google/oss-fuzz-vulns · GitHub
Exploit;Third Party Advisory

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