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CVE-2020-12673

Status Candidate

Overview

In Dovecot before 2.3.11.3, sending a specially formatted NTLM request will crash the auth service because of an out-of-bounds read.

Related Files

Red Hat Security Advisory 2020-3736-01
Posted Sep 14, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3736-01 - Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Issues addressed include a resource exhaustion vulnerability.

tags | advisory, imap
systems | linux, redhat, unix
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | f2f761dd7dde49bfd4aa597adb004d01505647c371efea19e6e4504615a4b0aa
Red Hat Security Advisory 2020-3735-01
Posted Sep 14, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3735-01 - Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Issues addressed include a resource exhaustion vulnerability.

tags | advisory, imap
systems | linux, redhat, unix
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | dd5369db54a4b97a48e0ec79ac558ed78b8cc59d447c2e0929f168ab5654f573
Red Hat Security Advisory 2020-3713-01
Posted Sep 10, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3713-01 - Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Issues addressed include a resource exhaustion vulnerability.

tags | advisory, imap
systems | linux, redhat, unix
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | fb59fad9d07e625d5f38b44bf743d2a63224244c690ddb5fc7e29a99b4d2b051
Gentoo Linux Security Advisory 202009-02
Posted Sep 7, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202009-2 - Multiple vulnerabilities have been found in Dovecot, the worst of which could allow remote attackers to cause a Denial of Service condition. Versions less than 2.3.11.3 are affected.

tags | advisory, remote, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | a8406344c7b252401291699045d45ef5f15fde228e7644af31cac3f16f9741c0
Red Hat Security Advisory 2020-3617-01
Posted Sep 3, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3617-01 - Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Issues addressed include a resource exhaustion vulnerability.

tags | advisory, imap
systems | linux, redhat, unix
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | 3e7cf4227b43d701bce0f2c45f34690a4bc28657983ceb7b548761524b3dd143
Ubuntu Security Notice USN-4456-2
Posted Aug 17, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4456-2 - USN-4456-1 fixed several vulnerabilities in Dovecot. This update provides the corresponding update for Ubuntu 14.04 ESM. It was discovered that Dovecot incorrectly handled deeply nested MIME parts. A remote attacker could possibly use this issue to cause Dovecot to consume resources, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | e612cc59d0086f2fe8392c474296f7b6497aa81939e60409aeee130585a1e2f7
Ubuntu Security Notice USN-4456-1
Posted Aug 12, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4456-1 - It was discovered that Dovecot incorrectly handled deeply nested MIME parts. A remote attacker could possibly use this issue to cause Dovecot to consume resources, resulting in a denial of service. It was discovered that Dovecot incorrectly handled memory when using NTLM. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. It was discovered that the Dovecot RPA mechanism incorrectly handled zero-length messages. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | 92f79dc3df0ec06f5cefb85e621601251c661132d679e69cee61a4bcdc9ff89a
Debian Security Advisory 4745-1
Posted Aug 12, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4745-1 - Several vulnerabilities have been discovered in the Dovecot email server.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
SHA-256 | e77015aab1b26d25b21febdfdb9e607af81fe1cc6f92ff6eb0a5b91511129267
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