Integer Underflow Affecting dnsmasq package, versions <2.75-1ubuntu0.16.04.3
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-DNSMASQ-356208
- published3 Oct 2017
- disclosed3 Oct 2017
Introduced: 3 Oct 2017
CVE-2017-14496 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 dnsmasq to version 2.75-1ubuntu0.16.04.3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream dnsmasq package and not the dnsmasq package as distributed by Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service via a crafted DNS request.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-14496
- https://www.kb.cert.org/vuls/id/973527
- http://nvidia.custhelp.com/app/answers/detail/a_id/4561
- https://access.redhat.com/security/vulnerabilities/3199382
- https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
- https://source.android.com/security/bulletin/2017-10-01
- https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
- http://thekelleys.org.uk/dnsmasq/CHANGELOG
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2017-005.txt
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14496
- http://www.debian.org/security/2017/dsa-3989
- https://security-tracker.debian.org/tracker/CVE-2017-14496
- https://www.exploit-db.com/exploits/42946/
- https://security.gentoo.org/glsa/201710-27
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
- https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg11664.html
- https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg11665.html
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html
- https://access.redhat.com/errata/RHSA-2017:2836
- http://www.securityfocus.com/bid/101085
- http://www.securityfocus.com/bid/101977
- http://www.securitytracker.com/id/1039474
- http://www.ubuntu.com/usn/USN-3430-1
- http://www.ubuntu.com/usn/USN-3430-2
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
- https://www.exploit-db.com/exploits/42946