Debian fixes 1 vulnerability

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[TLP:CLEAR] Debian fixes 1 vulnerability

Debian has released a fix for a vulnerability in the Dovecot software package (IMAP and POP3 server). The fix is available for the trixie (security) release in version 1:2.4.1+dfsg1-6+deb13u1 [1]. Older Debian versions, such as bullseye and bookworm, were not affected by this vulnerability [2].

Dovecot - cache key collision (CVE-2025-30189)

CVSS 7.4 (High)

Allows an attacker to influence the authentication process (through collisions of records in the auth cache) and potentially bypass it, due to the incorrect use of the generic cache key AUTH_CACHE_KEY_USER instead of database-specific keys [2].

The vulnerability is present in product:

Debian:dovecot; =1:2.4.1+dfsg1-6

CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

More information:

CVE-2025-30189 at cve.org, NVD
CWE-287: Improper Authentication at cwe.mitre.org

The vulnerability was publicly disclosed 6. 10. 2025.

Links

By CESNET, z.s.p.o. Michaela Jarošová on 9. 10. 2025.

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[TLP:CLEAR] Debian fixes 1 vulnerability

Dovecot - cache key collision (CVE-2025-30189)

CVSS 7.4 (High)

Links