DEBIAN-CVE-2026-107161
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-107161
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107161.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-107161
- Upstream
- CVE-2026-107161
- Published
- 2026-10-07T20:17:10Z
- Modified
- 2026-10-09T09:47:22Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
A heap-based buffer overflow flaw was found in Cyrus SASL. The add_to_challenge() function in the DIGEST-MD5 plugin computes the size of the buffer needed for a challenge/response field before DIGEST-MD5 quoting is applied, but does not recompute that size when quoting (escaping special characters) makes the value longer. The under-sized buffer is then passed to strcat(), causing a heap-based out-of-bounds write whose size depends on attacker-controlled input. A malicious or on-path DIGEST-MD5 (or HTTP Digest) server can trigger this flaw in a connecting client by supplying a crafted challenge field, such as realm or nonce, most likely resulting in a crash of the client application.
- References
Affected packages
Debian:12 / cyrus-sasl2
Package
- Name
- cyrus-sasl2
- Purl
- pkg:deb/debian/cyrus-sasl2?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / cyrus-sasl2
Package
- Name
- cyrus-sasl2
- Purl
- pkg:deb/debian/cyrus-sasl2?arch=source&distro=trixie
Debian:14 / cyrus-sasl2
Package
- Name
- cyrus-sasl2
- Purl
- pkg:deb/debian/cyrus-sasl2?arch=source&distro=forky