In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - dovecot: Buffer overflow in indexer-worker process results in privilege escalation (CVE-2019-7524)

  - A postinstall script in the dovecot rpm allows local users to read the contents of newly created SSL/TLS     key files. (CVE-2016-4983)

  - It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client     certificates. A remote attacker in possession of a valid certificate with an empty username field could     possibly use this issue to impersonate other users. (CVE-2019-3814)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 5 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - dovecot: Buffer overflow in indexer-worker process results in privilege escalation (CVE-2019-7524)

  - Dovecot 1.2.x before 1.2.8 sets 0777 permissions during creation of certain directories at installation     time, which allows local users to access arbitrary user accounts by replacing the auth socket, related to     the parent directories of the base_dir directory, and possibly the base_dir directory itself.
    (CVE-2009-3897)

  - Dovecot 1.1 before 2.2.13 and dovecot-ee before 2.1.7.7 and 2.2.x before 2.2.12.12 does not properly close     old connections, which allows remote attackers to cause a denial of service (resource consumption) via an     incomplete SSL/TLS handshake for an IMAP/POP3 connection. (CVE-2014-3430)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-1062 advisory.

    - fix CVE-2019-11500: IMAP protocol parser does not properly handle NUL byte       when scanning data in quoted strings, leading to out of bounds heap       memory writes (#1741787)
    - fix CVE-2019-3814: improper certificate validation (#1674369)
    - fix CVE-2019-7524: buffer overflow in indexer-worker process resulting in privilege       escalation (#1700398)

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

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

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has dovecot packages installed that are affected by multiple vulnerabilities:

  - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the     fts and pop3-uidl components. (CVE-2019-7524)

  - It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client     certificates. A remote attacker in possession of a valid certificate with an empty username field could     possibly use this issue to impersonate other users. (CVE-2019-3814)

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

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has dovecot packages installed that are affected by multiple vulnerabilities:

  - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the     fts and pop3-uidl components. (CVE-2019-7524)

  - It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client     certificates. A remote attacker in possession of a valid certificate with an empty username field could     possibly use this issue to impersonate other users. (CVE-2019-3814)

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

The version of dovecot installed on the remote host is prior to 2.2.36-6. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1473 advisory.

    In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the     fts and pop3-uidl components. (CVE-2019-7524)

    It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client     certificates. A remote attacker in possession of a valid certificate with an empty username field could     possibly use this issue to impersonate other users. (CVE-2019-3814)

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

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

The version of dovecot installed on the remote host is prior to 2.2.36-6.19. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1363 advisory.

    In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the     fts and pop3-uidl components. (CVE-2019-7524)

    It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client     certificates. A remote attacker in possession of a valid certificate with an empty username field could     possibly use this issue to impersonate other users. (CVE-2019-3814)

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

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

* dovecot: Improper certificate validation * dovecot: Buffer overflow in indexer-worker process results in privilege escalation

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1062 advisory.

  - It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client     certificates. A remote attacker in possession of a valid certificate with an empty username field could     possibly use this issue to impersonate other users. (CVE-2019-3814)

  - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the     fts and pop3-uidl components. (CVE-2019-7524)

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

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1062 advisory.

    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.

    Security Fix(es):

    * dovecot: Improper certificate validation (CVE-2019-3814)

    * dovecot: Buffer overflow in indexer-worker process results in privilege escalation (CVE-2019-7524)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.8 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

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 2.2.36.3 and 2.3.x before 2.3.5.1, a     local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to     root. This occurs because of missing checks in the fts     and pop3-uidl components.(CVE-2019-7524)

  - The JSON encoder in Dovecot before 2.3.5.2 allows     attackers to repeatedly crash the authentication     service by attempting to authenticate with an invalid     UTF-8 sequence as the username.(CVE-2019-10691)

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.

dovecot updated to 2.3.6, includes several security fixes

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
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 :

  - It was discovered that Dovecot incorrectly handled     client certificates. A remote attacker in possession of     a valid certificate with an empty username field could     possibly use this issue to impersonate other     users.(CVE-2019-3814)

  - In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a     local attacker can cause a buffer overflow in the     indexer-worker process, which can be used to elevate to     root. This occurs because of missing checks in the fts     and pop3-uidl components.(CVE-2019-7524)

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 issues fixed :

  - CVE-2019-7524: Fixed an improper file handling which     could result in stack overflow allowing local root     escalation (bsc#1130116).

  - CVE-2019-3814: Fixed a vulnerability related to SSL     client certificate authentication (bsc#1123022).

Other issue fixed :

  - Fixed handling of command continuation (bsc#1111789).

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

The remote host is affected by the vulnerability described in GLSA-201904-19 (Dovecot: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Dovecot. Please review       the CVE identifiers referenced below for details.
  Impact :

    Please review the referenced CVE identifiers for details   Workaround :

    There is no known workaround at this time.

This update for dovecot23 fixes the following issue :

Security issue fixed :

  - CVE-2019-7524: Fixed an improper file handling which     could result in stack oveflow allowing local root     escalation (bsc#1130116).

This update was imported from the SUSE:SLE-15:Update update project.

This update for dovecot22 fixes the following issues :

Security issues fixed :

CVE-2019-7524: Fixed an improper file handling which could result in stack overflow allowing local root escalation (bsc#1130116).

CVE-2019-3814: Fixed a vulnerability related to SSL client certificate authentication (bsc#1123022).

Other issue fixed: Fixed handling of command continuation(bsc#1111789)

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 dovecot23 fixes the following issue :

Security issue fixed :

CVE-2019-7524: Fixed an improper file handling which could result in stack oveflow allowing local root escalation (bsc#1130116).

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.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3928-1 advisory.

    It was discovered that Dovecot incorrectly handled reading certain headers from the index. A local     attacker could possibly use this issue to escalate privileges.

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

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

A vulnerability was discovered in the Dovecot email server. When reading FTS or POP3-UIDL headers from the Dovecot index, the input buffer size is not bounds-checked. An attacker with the ability to modify dovecot indexes, can take advantage of this flaw for privilege escalation or the execution of arbitrary code with the permissions of the dovecot user. Only installations using the FTS or pop3 migration plugins are affected.

A security vulnerability was discovered in the Dovecot email server.
When reading FTS headers from the Dovecot index, the input buffer size is not bounds-checked. An attacker with the ability to modify dovecot indexes, can take advantage of this flaw for privilege escalation or the execution of arbitrary code with the permissions of the dovecot user. Only installations using the FTS plugins are affected.

For Debian 8 'Jessie', this problem has been fixed in version 1:2.2.13-12~deb8u6.

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.

Aki Tuomi reports :

Vulnerability Details : When reading FTS or POP3-UIDL header from dovecot index, the input buffer size is not bound, and data is copied to target structure causing stack overflow.

Risk : This can be used for local root privilege escalation or executing arbitrary code in dovecot process context. This requires ability to directly modify dovecot indexes. Steps to reproduce :
Produce dovecot.index.log entry that creates an FTS header which has more than 12 bytes of data. Trigger dovecot indexer-worker or run doveadm index. Dovecot will crash.

Mitigations : Since 2.3.0 dovecot has been compiled with stack smash protection, ASLR, read-only GOT tables and other techniques that make exploiting this bug much harder.

ID	Name	Product	Family	Severity
198627	RHEL 6 : dovecot (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
198579	RHEL 5 : dovecot (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
196201	RHEL 6 : dovecot (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	high
196180	RHEL 5 : dovecot (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
180699	Oracle Linux 7 : dovecot (ELSA-2020-1062)	Nessus	Oracle Linux Local Security Checks	high
144049	NewStart CGSL CORE 5.05 / MAIN 5.05 : dovecot Multiple Vulnerabilities (NS-SA-2020-0105)	Nessus	NewStart CGSL Local Security Checks	high
143982	NewStart CGSL CORE 5.04 / MAIN 5.04 : dovecot Multiple Vulnerabilities (NS-SA-2020-0071)	Nessus	NewStart CGSL Local Security Checks	high
139852	Amazon Linux 2 : dovecot (ALAS-2020-1473)	Nessus	Amazon Linux Local Security Checks	high
136624	Amazon Linux AMI : dovecot (ALAS-2020-1363)	Nessus	Amazon Linux Local Security Checks	high
135805	Scientific Linux Security Update : dovecot on SL7.x x86_64 (20200407)	Nessus	Scientific Linux Local Security Checks	high
135329	CentOS 7 : dovecot (RHSA-2020:1062)	Nessus	CentOS Local Security Checks	high
135038	RHEL 7 : dovecot (RHSA-2020:1062)	Nessus	Red Hat Local Security Checks	high
126271	EulerOS 2.0 SP8 : dovecot (EulerOS-SA-2019-1644)	Nessus	Huawei Local Security Checks	high
125910	Fedora 30 : 1:dovecot (2019-9e004decea)	Nessus	Fedora Local Security Checks	high
125496	EulerOS 2.0 SP3 : dovecot (EulerOS-SA-2019-1569)	Nessus	Huawei Local Security Checks	high
124376	EulerOS 2.0 SP5 : dovecot (EulerOS-SA-2019-1280)	Nessus	Huawei Local Security Checks	high
124375	EulerOS 2.0 SP2 : dovecot (EulerOS-SA-2019-1279)	Nessus	Huawei Local Security Checks	high
124142	openSUSE Security Update : dovecot22 (openSUSE-2019-1220)	Nessus	SuSE Local Security Checks	high
124132	GLSA-201904-19 : Dovecot: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
124105	openSUSE Security Update : dovecot23 (openSUSE-2019-1212)	Nessus	SuSE Local Security Checks	high
123926	SUSE SLES12 Security Update : dovecot22 (SUSE-SU-2019:0900-1)	Nessus	SuSE Local Security Checks	high
123784	SUSE SLES15 Security Update : dovecot23 (SUSE-SU-2019:0876-1)	Nessus	SuSE Local Security Checks	high
123641	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Dovecot vulnerability (USN-3928-1)	Nessus	Ubuntu Local Security Checks	high
123530	Debian DSA-4418-1 : dovecot - security update	Nessus	Debian Local Security Checks	high
123523	Debian DLA-1736-1 : dovecot security update	Nessus	Debian Local Security Checks	high
123481	FreeBSD : dovecot -- Buffer overflow reading extension header (7862213c-5152-11e9-8b26-a4badb296695)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2019-7524

high

Tenable Plugins

high

high

high

critical

high

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high

high

high

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