Executive Summary

Titledovecot security update
NameDSA-4385First vendor Publication2019-02-05
VendorDebianLast vendor Modification2019-02-05
Severity (Vendor) N/ARevision1

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base ScoreN/AAttack RangeN/A
Cvss Impact ScoreN/AAttack ComplexityN/A
Cvss Expoit ScoreN/AAuthenticationN/A
Calculate full CVSS 2.0 Vectors scores


halfdog discovered an authentication bypass vulnerability in the Dovecot email server. Under some configurations Dovecot mistakenly trusts the username provided via authentication instead of failing. If there is no additional password verification, this allows the attacker to login as anyone else in the system. Only installations using:

auth_ssl_require_client_cert = yes auth_ssl_username_from_cert = yes

are affected by this flaw.

For the stable distribution (stretch), this problem has been fixed in version 1:2.2.27-3+deb9u3.

We recommend that you upgrade your dovecot packages.

For the detailed security status of dovecot please refer to its security tracker page at: https://security-tracker.debian.org/tracker/dovecot

Original Source

Url : http://www.debian.org/security/2019/dsa-4385

Alert History

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2019-02-05 21:18:37
  • First insertion