A vulnerability was found in the implementation of DNSSEC in Dnsmasq up to and including 2.78. Wildcard synthesized NSEC records could be improperly interpreted to prove the non-existence of hostnames that actually exist.

The remote SUSE Linux SLES11 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2019:14190-1 advisory.

  - A vulnerability was found in the implementation of DNSSEC in Dnsmasq up to and including 2.78. Wildcard     synthesized NSEC records could be improperly interpreted to prove the non-existence of hostnames that     actually exist. (CVE-2017-15107)

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

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

  - A vulnerability was found in the implementation of     DNSSEC in Dnsmasq up to and including 2.78. Wildcard     synthesized NSEC records could be improperly     interpreted to prove the non-existence of hostnames     that actually exist.(CVE-2017-15107)

  - A flaw was found in dnsmasq before version 2.83. When     getting a reply from a forwarded query, dnsmasq checks     in forward.c:reply_query(), which is the forwarded     query that matches the reply, by only using a weak hash     of the query name. Due to the weak hash (CRC32 when     dnsmasq is compiled without DNSSEC, SHA-1 when it is)     this flaw allows an off-path attacker to find several     different domains all having the same hash,     substantially reducing the number of attempts they     would have to perform to forge a reply and get it     accepted by dnsmasq. This is in contrast with RFC5452,     which specifies that the query name is one of the     attributes of a query that must be used to match a     reply. This flaw could be abused to perform a DNS Cache     Poisoning attack. If chained with CVE-2020-25684 the     attack complexity of a successful attack is reduced.
    The highest threat from this vulnerability is to data     integrity.(CVE-2020-25685)

  - A flaw was found in dnsmasq before version 2.83. When     receiving a query, dnsmasq does not check for an     existing pending request for the same name and forwards     a new request. By default, a maximum of 150 pending     queries can be sent to upstream servers, so there can     be at most 150 queries for the same name. This flaw     allows an off-path attacker on the network to     substantially reduce the number of attempts that it     would have to perform to forge a reply and have it     accepted by dnsmasq. This issue is mentioned in the     'Birthday Attacks' section of RFC5452. If chained with     CVE-2020-25684, the attack complexity of a successful     attack is reduced. The highest threat from this     vulnerability is to data integrity.(CVE-2020-25686)

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.

The remote Ubuntu 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4924-1 advisory.

    It was discovered that Dnsmasq incorrectly handled certain wildcard synthesized NSEC records. A remote     attacker could possibly use this issue to prove the non-existence of hostnames that actually exist.
    (CVE-2017-15107)

    It was discovered that Dnsmasq incorrectly handled certain large DNS packets. A remote attacker could     possibly use this issue to cause Dnsmasq to crash, resulting in a denial of service. (CVE-2019-14513)

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.

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

  - A vulnerability was found in dnsmasq before version     2.81, where the memory leak allows remote attackers to     cause a denial of service (memory consumption) via     vectors involving DHCP response     creation.(CVE-2019-14834)

  - A vulnerability was found in Dnsmasq's implementation     of DNSSEC. Wildcard synthesized NSEC records could be     improperly interpreted to prove the non-existence of     hostnames that actually exist.(CVE-2017-15107)

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 version of the dnsmasq packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - A vulnerability was found in Dnsmasq's implementation     of DNSSEC. Wildcard synthesized NSEC records could be     improperly interpreted to prove the non-existence of     hostnames that actually exist.(CVE-2017-15107)

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 version of the dnsmasq packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - A vulnerability was found in the implementation of     DNSSEC in Dnsmasq up to and including 2.78. Wildcard     synthesized NSEC records could be improperly     interpreted to prove the non-existence of hostnames     that actually exist.(CVE-2017-15107)

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 dnsmasq packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - A vulnerability was found in dnsmasq before version     2.81, where the memory leak allows remote attackers to     cause a denial of service (memory consumption) via     vectors involving DHCP response     creation.(CVE-2019-14834)

  - A vulnerability was found in Dnsmasq's implementation     of DNSSEC. Wildcard synthesized NSEC records could be     improperly interpreted to prove the non-existence of     hostnames that actually exist.(CVE-2017-15107)

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 dnsmasq fixes the following issues :

Security issues fixed: &#9; 

  - CVE-2019-14834: Fixed a memory leak which could have     allowed to remote attackers to cause denial of service     via DHCP response creation (bsc#1154849)

  - CVE-2017-15107: Fixed a vulnerability in DNSSEC     implementation. Processing of wildcard synthesized NSEC     records may result improper validation for non-existance     (bsc#1076958).

Other issues addressed :

  - Included linux/sockios.h to get SIOCGSTAMP     (bsc#1156543).

  - Removed cache size limit (bsc#1138743).

  - bsc#1152539: include config files from     /etc/dnsmasq.d/*.conf .

This update was imported from the SUSE:SLE-15-SP1:Update update project.

This update for dnsmasq fixes the following issues :

Security issues fixed :

CVE-2019-14834: Fixed a memory leak which could have allowed to remote attackers to cause denial of service via DHCP response creation (bsc#1154849)

CVE-2017-15107: Fixed a vulnerability in DNSSEC implementation.
Processing of wildcard synthesized NSEC records may result improper validation for non-existance (bsc#1076958).

Other issues addressed: Included linux/sockios.h to get SIOCGSTAMP (bsc#1156543).

Removed cache size limit (bsc#1138743).

bsc#1152539: include config files from /etc/dnsmasq.d/*.conf .

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 :

Security issues fixed :

CVE-2019-14834: Fixed a memory leak which could have allowed to remote attackers to cause denial of service via DHCP response creation (bsc#1154849)

CVE-2017-15107: Fixed a vulnerability in DNSSEC implementation.
Processing of wildcard synthesized NSEC records may result improper validation for non-existance (bsc#1076958).

Other issues addressed: Included linux/sockios.h to get SIOCGSTAMP (bsc#1156543).

Removed cache size limit (bsc#1138743).

Included config files from /etc/dnsmasq.d/*.conf (bsc#1152539).

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 :

Security issue fixed :

CVE-2017-15107: Fixed a vulnerability in DNSSEC implementation.
Processing of wildcard synthesized NSEC records may result improper validation for non-existance. (bsc#1076958)

Non-security issue fixed: Reload system dbus to pick up policy change on install (bsc#1054429).

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.

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

  - An integer underflow flaw leading to a buffer over-read     was found in dnsmasq in the DNS code. An attacker could     send crafted DNS packets to dnsmasq which would cause     it to crash.i1/4^CVE-2017-13704i1/4%0

  - A vulnerability was found in Dnsmasq's implementation     of DNSSEC. Wildcard synthesized NSEC records could be     improperly interpreted to prove the non-existence of     hostnames that actually exist.i1/4^CVE-2017-15107i1/4%0

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.

An update of the dnsmasq package has been released.

DNSSEC fix for wildcard NSEC records (CVE-2017-15107)

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.

ID	Name	Product	Family	Severity
150514	SUSE SLES11 Security Update : dnsmasq (SUSE-SU-2019:14190-1)	Nessus	SuSE Local Security Checks	high
149190	EulerOS 2.0 SP3 : dnsmasq (EulerOS-SA-2021-1775)	Nessus	Huawei Local Security Checks	high
148938	Ubuntu 16.04 LTS : Dnsmasq vulnerabilities (USN-4924-1)	Nessus	Ubuntu Local Security Checks	high
141645	EulerOS Virtualization 3.0.2.2 : dnsmasq (EulerOS-SA-2020-2215)	Nessus	Huawei Local Security Checks	high
140950	EulerOS Virtualization for ARM 64 3.0.6.0 : dnsmasq (EulerOS-SA-2020-2002)	Nessus	Huawei Local Security Checks	high
137995	EulerOS Virtualization 3.0.6.0 : dnsmasq (EulerOS-SA-2020-1776)	Nessus	Huawei Local Security Checks	high
137013	EulerOS 2.0 SP5 : dnsmasq (EulerOS-SA-2020-1595)	Nessus	Huawei Local Security Checks	high
136233	EulerOS Virtualization for ARM 64 3.0.2.0 : dnsmasq (EulerOS-SA-2020-1530)	Nessus	Huawei Local Security Checks	high
131994	openSUSE Security Update : dnsmasq (openSUSE-2019-2669)	Nessus	SuSE Local Security Checks	high
131758	SUSE SLED15 / SLES15 Security Update : dnsmasq (SUSE-SU-2019:3189-1)	Nessus	SuSE Local Security Checks	high
131757	SUSE SLED15 / SLES15 Security Update : dnsmasq (SUSE-SU-2019:3188-1)	Nessus	SuSE Local Security Checks	high
126460	SUSE SLED12 / SLES12 Security Update : dnsmasq (SUSE-SU-2019:1721-1)	Nessus	SuSE Local Security Checks	high
123860	EulerOS Virtualization 2.5.3 : dnsmasq (EulerOS-SA-2019-1174)	Nessus	Huawei Local Security Checks	high
121920	Photon OS 2.0: Dnsmasq PHSA-2018-2.0-0017	Nessus	PhotonOS Local Security Checks	high
121810	Photon OS 1.0: Dnsmasq PHSA-2018-1.0-0109	Nessus	PhotonOS Local Security Checks	high
106640	Fedora 26 : dnsmasq (2018-9780220f7d)	Nessus	Fedora Local Security Checks	high
106522	Fedora 27 : dnsmasq (2018-fbe4017846)	Nessus	Fedora Local Security Checks	high

Detections

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CVE-2017-15107

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