Source: libcoap3 Version: 4.3.5-2 Severity: important Tags: security upstream Forwarded: https://github.com/obgm/libcoap/pull/1737 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for libcoap3. CVE-2025-34468[0]: | libcoap versions up to and including 4.3.5, prior to commit 30db3ea, | contain a stack-based buffer overflow in address resolution when | attacker-controlled hostname data is copied into a fixed 256-byte | stack buffer without proper bounds checking. A remote attacker can | trigger a crash and potentially achieve remote code execution | depending on compiler options and runtime memory protections. | Exploitation requires the proxy logic to be enabled (i.e., the proxy | request handling code path in an application using libcoap). If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2025-34468 https://www.cve.org/CVERecord?id=CVE-2025-34468 [1] https://github.com/obgm/libcoap/pull/1737 [2] https://github.com/obgm/libcoap/commit/cc9aba6e01973b7cc06b7b20d0986411e5f5e2ef Please adjust the affected versions in the BTS as needed. Regards, Salvatore
