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Debian Security Advisory 4385-1

Debian Security Advisory 4385-1
Posted Feb 6, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4385-1 - 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.

tags | advisory, bypass
systems | linux, debian
advisories | CVE-2019-3814
MD5 | 59f2eb21224b4ade9f55a314275c3509

Debian Security Advisory 4385-1

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4385-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
February 05, 2019 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : dovecot
CVE ID : CVE-2019-3814

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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