A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the process to restart.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI     server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the     process to restart. (CVE-2017-15130)

Note that Nessus relies on the presence of the package as reported by the vendor.

According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A denial of service flaw was found in dovecot before     2.2.34. An attacker able to generate random SNI server     names could exploit TLS SNI configuration lookups,     leading to excessive memory usage and the process to     restart.(CVE-2017-15130)

  - A specially crafted email delivered over SMTP and     passed on to Dovecot by MTA can trigger an out of     bounds read resulting in potential sensitive     information disclosure and denial of service. In order     to trigger this vulnerability, an attacker needs to     send a specially crafted email message to the     server.(CVE-2017-14461)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A denial of service flaw was found in dovecot before     2.2.34. An attacker able to generate random SNI server     names could exploit TLS SNI configuration lookups,     leading to excessive memory usage and the process to     restart.(CVE-2017-15130)

  - A specially crafted email delivered over SMTP and     passed on to Dovecot by MTA can trigger an out of     bounds read resulting in potential sensitive     information disclosure and denial of service. In order     to trigger this vulnerability, an attacker needs to     send a specially crafted email message to the     server.(CVE-2017-14461)

  - In Dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2     (and Pigeonhole before 0.5.7.2), protocol processing     can fail for quoted strings. This occurs because '\0'     characters are mishandled, and can lead to     out-of-bounds writes and remote code     execution.(CVE-2019-11500)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In Dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2     (and Pigeonhole before 0.5.7.2), protocol processing     can fail for quoted strings. This occurs because '\0'     characters are mishandled, and can lead to     out-of-bounds writes and remote code     execution.(CVE-2019-11500)

  - A specially crafted email delivered over SMTP and     passed on to Dovecot by MTA can trigger an out of     bounds read resulting in potential sensitive     information disclosure and denial of service. In order     to trigger this vulnerability, an attacker needs to     send a specially crafted email message to the     server.(CVE-2017-14461)

  - A denial of service flaw was found in dovecot before     2.2.34. An attacker able to generate random SNI server     names could exploit TLS SNI configuration lookups,     leading to excessive memory usage and the process to     restart.(CVE-2017-15130)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for dovecot22 fixes the following issues :

Security issue fixed :

CVE-2017-15130: Fixed a potential denial of service via TLS SNI config lookups, which would slow the process down and could have led to exhaustive memory allocation and/or process restarts (bsc#1082828)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for dovecot22 fixes the following issues :

Security issue fixed :

  - CVE-2017-15130: Fixed a potential denial of service via     TLS SNI config lookups, which would slow the process     down and could have led to exhaustive memory allocation     and/or process restarts (bsc#1082828)

This update was imported from the SUSE:SLE-12:Update update project.

Several vulnerabilities have been discovered in the Dovecot email server. The Common Vulnerabilities and Exposures project identifies the following issues :

CVE-2017-14461

Aleksandar Nikolic of Cisco Talos and 'flxflndy' discovered that Dovecot does not properly parse invalid email addresses, which may cause a crash or leak memory contents to an attacker.

CVE-2017-15130

It was discovered that TLS SNI config lookups may lead to excessive memory usage, causing imap-login/pop3-login VSZ limit to be reached and the process restarted, resulting in a denial of service. Only Dovecot configurations containing local_name { } or local { } configuration blocks are affected.

CVE-2017-15132

It was discovered that Dovecot contains a memory leak flaw in the login process on aborted SASL authentication.

For Debian 7 'Wheezy', these problems have been fixed in version 1:2.1.7-7+deb7u2.

We recommend that you upgrade your dovecot packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3587-1 advisory.

    It was discovered that Dovecot incorrectly handled parsing certain email addresses. A remote attacker     could use this issue to cause Dovecot to crash, resulting in a denial of service, or possibly obtain     sensitive information. (CVE-2017-14461)

    It was discovered that Dovecot incorrectly handled TLS SNI config lookups. A remote attacker could     possibly use this issue to cause Dovecot to crash, resulting in a denial of service. (CVE-2017-15130)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Several vulnerabilities have been discovered in the Dovecot email server. The Common Vulnerabilities and Exposures project identifies the following issues :

  - CVE-2017-14461     Aleksandar Nikolic of Cisco Talos and 'flxflndy'     discovered that Dovecot does not properly parse invalid     email addresses, which may cause a crash or leak memory     contents to an attacker.

  - CVE-2017-15130     It was discovered that TLS SNI config lookups may lead     to excessive memory usage, causing imap-login/pop3-login     VSZ limit to be reached and the process restarted,     resulting in a denial of service. Only Dovecot     configurations containing local_name { } or local { }     configuration blocks are affected.

  - CVE-2017-15132     It was discovered that Dovecot contains a memory leak     flaw in the login process on aborted SASL     authentication.

ID	Name	Product	Family	Severity
220685	Linux Distros Unpatched Vulnerability : CVE-2017-15130	Nessus	Misc.	medium
132288	EulerOS 2.0 SP3 : dovecot (EulerOS-SA-2019-2571)	Nessus	Huawei Local Security Checks	high
131864	EulerOS 2.0 SP2 : dovecot (EulerOS-SA-2019-2372)	Nessus	Huawei Local Security Checks	critical
130847	EulerOS 2.0 SP5 : dovecot (EulerOS-SA-2019-2138)	Nessus	Huawei Local Security Checks	critical
118287	SUSE SLES12 Security Update : dovecot22 (SUSE-SU-2018:2632-2)	Nessus	SuSE Local Security Checks	medium
117355	SUSE SLES12 Security Update : dovecot22 (SUSE-SU-2018:2632-1)	Nessus	SuSE Local Security Checks	medium
117352	openSUSE Security Update : dovecot22 (openSUSE-2018-973)	Nessus	SuSE Local Security Checks	medium
108767	Debian DLA-1333-1 : dovecot security update	Nessus	Debian Local Security Checks	high
107147	Ubuntu 14.04 LTS / 16.04 LTS : Dovecot vulnerabilities (USN-3587-1)	Nessus	Ubuntu Local Security Checks	high
107122	Debian DSA-4130-1 : dovecot - security update	Nessus	Debian Local Security Checks	high

Detections

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CVE-2017-15130

medium

Tenable Plugins

medium

high

critical

critical

medium

medium

medium

high

high

high