Out-of-bounds Read in Wolfssl
CVE-2022-42905
In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS 1.3 client or network attacker can trigger a buffer over-read on the heap of 5 bytes. (WOLFSSL_CALLBACKS is only intended for debugging.)
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.021 (80.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.021 · change: +0.001
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.wolfssl.com/docs/security-vulnerabilities/ (Vendor Advisory)
- github.com/wolfSSL/wolfssl/releases (Third Party Advisory, Release Notes)
- github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable (Third Party Advisory, Release Notes)
- seclists.org/fulldisclosure/2023/Jan/11 (mailing-list, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over… (Third Party Advisory)
- blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
Frequently asked questions
- What is CVE-2022-42905?
- CVE-2022-42905 is a critical-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-11-07.
- How severe is CVE-2022-42905?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2022-42905 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.