| Name | CVE-2023-6936 |
| 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). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1059357 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| wolfssl (PTS) | bullseye | 4.6.0+p1-0+deb11u2 | vulnerable |
| bookworm | 5.5.4-2+deb12u1 | vulnerable |
| sid, trixie | 5.6.6-1.3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| wolfssl | source | experimental | 5.6.6-1 | | | |
| wolfssl | source | (unstable) | 5.6.6-1.2 | | | 1059357 |
Notes
[bookworm] - wolfssl <no-dsa> (Minor issue)
[bullseye] - wolfssl <no-dsa> (Minor issue)
https://github.com/wolfSSL/wolfssl/blob/v5.6.6-stable/ChangeLog.md#vulnerabilities