Dnsmasq before 2.76 allows remote servers to cause a denial of service (crash) via a reply with an empty DNS address that has an (1) A or (2) AAAA record defined locally.

An update of the dnsmasq package has been released.

The version of dnsmasq installed on the remote host is at least 2.73 and prior to 2.76, and thus, is affected by a denial of service vulnerability when handling a reply that a given name is empty while the A or AAAA record is defined locally and in a hosts file.

This update for dnsmasq fixes the following security issues :

  - CVE-2017-14491: 2 byte heap based overflow.
    [bsc#1060354]

  - CVE-2017-14492: heap based overflow. [bsc#1060355]

  - CVE-2017-14493: stack based overflow. [bsc#1060360]

  - CVE-2017-14494: DHCP - info leak. [bsc#1060361]

  - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]

  - CVE-2017-14496: DNS - DoS Integer underflow.
    [bsc#1060364] This update brings a (small) potential     incompatibility in the handling of 'basename' in
    --pxe-service. Please read the CHANGELOG and the     documentation if you are using this option.

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 dnsmasq fixes the following issues. Remedy the following security issues :

  - CVE-2017-14491: 2 byte heap based overflow.
    [bsc#1060354]

  - CVE-2017-14492: heap based overflow. [bsc#1060355]

  - CVE-2017-14493: stack based overflow. [bsc#1060360]

  - CVE-2017-14494: DHCP - info leak. [bsc#1060361]

  - CVE-2017-14495: DNS - OOM DoS. [bsc#1060362]

  - CVE-2017-14496: DNS - DoS Integer underflow.
    [bsc#1060364]

  - Prevent a man-in-the-middle attack (bsc#972164,     fate#321175). Furthermore, the following issues have     been fixed :

  - Fix DHCP relaying, broken in 2.76 and 2.77.

  - Update to version 2.78 (fate#321175, fate#322030,     bsc#1035227).

  - Fix PXE booting for UEFI architectures (fate#322030).

  - Drop PrivateDevices=yes which breaks logging     (bsc#902511, bsc#904537)

  - Build with support for DNSSEC (fate#318323, bsc#908137).
    Please note that this update brings a (small) potential     incompatibility in the handling of 'basename' in
    --pxe-service. Please read the CHANGELOG and the     documentation if you are using this option.

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 dnsmasq fixes the following issues :

  - CVE-2015-8899: Denial of service between local and     remote dns entries (bsc#983273)

This update was imported from the SUSE:SLE-12-SP1:Update update project.

This update for dnsmasq fixes the following issues :

  - CVE-2015-8899: Denial of service between local and     remote dns entries (bsc#983273)

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.

Enhancement update.

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.

Security update.

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.

reports :

Dnsmasq before 2.76 allows remote servers to cause a denial of service (crash) via a reply with an empty DNS address that has an (1) A or (2) AAAA record defined locally.

The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3009-1 advisory.

    Edwin Trk discovered that Dnsmasq incorrectly handled certain CNAME responses. A remote attacker could     use this issue to cause Dnsmasq to crash, resulting in a denial of service.

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.

ID	Name	Product	Family	Severity
121647	Photon OS 1.0: Dnsmasq PHSA-2016-0012	Nessus	PhotonOS Local Security Checks	high
106138	dnsmasq < 2.76 Empty Address Denial of Service (CVE-2015-8899)	Nessus	DNS	high
103640	SUSE SLES11 Security Update : dnsmasq (SUSE-SU-2017:2619-1)	Nessus	SuSE Local Security Checks	critical
103638	SUSE SLES11 Security Update : dnsmasq (SUSE-SU-2017:2617-1)	Nessus	SuSE Local Security Checks	critical
103637	SUSE SLES12 Security Update : dnsmasq (SUSE-SU-2017:2616-1)	Nessus	SuSE Local Security Checks	critical
96277	openSUSE Security Update : dnsmasq (openSUSE-2017-10)	Nessus	SuSE Local Security Checks	high
96141	SUSE SLED12 / SLES12 Security Update : dnsmasq (SUSE-SU-2016:3269-1)	Nessus	SuSE Local Security Checks	high
95990	SUSE SLES11 Security Update : dnsmasq (SUSE-SU-2016:3199-1)	Nessus	SuSE Local Security Checks	high
92802	Fedora 23 : dnsmasq (2016-6db1c9eb69)	Nessus	Fedora Local Security Checks	high
92393	Fedora 24 : dnsmasq (2016-da2f9c22b4)	Nessus	Fedora Local Security Checks	high
91910	FreeBSD : dnsmasq -- denial of service (875e4cf8-3f0e-11e6-b3c8-14dae9d210b8)	Nessus	FreeBSD Local Security Checks	high
91725	Ubuntu 16.04 LTS : Dnsmasq vulnerability (USN-3009-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2015-8899

high

Tenable Plugins

high

high

critical

critical

critical

high

high

high

high

high

high

high