CVE-2023-6936 — Out-of-bounds Read in Wolfssl

CWE-125 — Out-of-bounds ReadCWE-126 — Buffer Over-read5 documents5 sources
Severity
9.1CRITICALNVD
EPSS
0.3%
top 49.17%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
8
WolfsslDebian WolfsslMsrc Azl3 Mariadb 10.11.6-3 ON Azure Linux 3.0+5 more
Timeline
PublishedFeb 20
Latest updateFeb 21

Description

In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HExploitability: 3.9 | Impact: 5.2

Affected Packages10 packages

▶debiandebian/wolfssl< wolfssl 5.6.6-1.2 (forky)
▶NVDwolfssl/wolfssl< 5.6.6
▶Debianwolfssl/wolfssl< 5.6.6-1.2+1
▶CVEListV5wolfssl/wolfssl5.6.5

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-cwpg-8775-j56v: In wolfSSL prior to 5↗2024-02-21
▶
OSV
CVE-2023-6936: In wolfSSL prior to 5↗2024-02-20
▶

📋Vendor Advisories

2
Microsoft
Heap-buffer over-read with WOLFSSL_CALLBACKS↗2024-02-13
▶
Debian
CVE-2023-6936: wolfssl - In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CA...↗2023
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CVE-2023-6936 — Out-of-bounds Read in Wolfssl | cvebase