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 Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-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 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 tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1473 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 this issue but has instead relied only on the application's self-reported version number.

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)

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

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: Improper certificate validation (CVE-2019-3814)

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

Note that Nessus has not tested for this issue 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: Improper certificate validation (CVE-2019-3814)

  - dovecot: Buffer overflow in indexer-worker process results in privilege escalation (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.

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.

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

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

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
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 (CESA-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

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