Out-of-bounds Read in Wolfssl

CVE-2024-5991

In function MatchDomainName(), input param str is treated as a NULL terminated string despite being user provided and unchecked. Specifically, the function X509_check_host() takes in a pointer and length to check against, with no requirements that it be NULL terminated. If a caller was attempting to do a name check on a non-NULL terminated buffer, the code would read beyond the bounds of the input array until it found a NULL terminator.This issue affects wolfSSL: through 5.7.0.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (43.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-5991?
CVE-2024-5991 is a high-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2024-08-27.
How severe is CVE-2024-5991?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2024-5991 known to be exploited?
4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.