CVE-2017-14496: Integer Underflow
First published: Tue Sep 26 2017(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/dnsmasq | 2.80-1+deb10u1 2.85-1 2.89-1 | |
| redhat/dnsmasq | <2.78 | 2.78 |
| Android | ||
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =17.04 | |
| Debian | =7.0 | |
| Debian | =7.1 | |
| Debian | =9.0 | |
| Android | =4.4.4 | |
| Android | =5.0.2 | |
| Android | =5.1.1 | |
| Android | =6.0 | |
| Android | =6.0.1 | |
| Android | =7.0 | |
| Android | =7.1.1 | |
| Android | =7.1.2 | |
| Android | =8.0 | |
| openSUSE | =42.2 | |
| openSUSE | =42.3 | |
| Red Hat Enterprise Linux Desktop | =7.0 | |
| Red Hat Enterprise Linux Server | =7.0 | |
| Red Hat Enterprise Linux Workstation | =7.0 | |
| Dnsmasq | <=2.77 |
Remedy
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
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Reference Links
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
- https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- https://security-tracker.debian.org/tracker/CVE-2017-14496
- https://access.redhat.com/security/cve/CVE-2017-14496
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1330995&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1330995&action=edit
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=5bb88f096363e66ac08e31761f850a1d5aa22244
- https://access.redhat.com/security/vulnerabilities/3199382
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1497691
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commitdiff;h=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- https://github.com/google/security-research-pocs/tree/master/vulnerabilities/dnsmasq
- https://access.redhat.com/errata/RHSA-2017:2836
- https://bugzilla.redhat.com/show_bug.cgi?id=1495416
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00006.html
- http://nvidia.custhelp.com/app/answers/detail/a_id/4561
- 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
- http://www.debian.org/security/2017/dsa-3989
- 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
- https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
- https://security.gentoo.org/glsa/201710-27
- https://source.android.com/security/bulletin/2017-10-01
- https://www.exploit-db.com/exploits/42946/
- https://www.kb.cert.org/vuls/id/973527
- 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
- https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
- https://android.googlesource.com/platform/external/dnsmasq/+/ff755ca73c98a1f2706fe86996e4bf6215054834
- https://android.googlesource.com/platform/external/dnsmasq/+/68a974de72b5091ce608815a349daaeb05cdeab5
- https://source.android.com/docs/security/bulletin/2017-10-01 (Advisory)
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=897c113fda0886a28a986cc6ba17bb93bd6cb1c7
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11664.html
Frequently Asked Questions
What is the severity of CVE-2017-14496?
CVE-2017-14496 has a severity rating that indicates it can result in a denial of service.
How do I fix CVE-2017-14496?
To fix CVE-2017-14496, upgrade to dnsmasq version 2.78 or later depending on your distribution.
What is the impact of CVE-2017-14496?
CVE-2017-14496 allows remote attackers to exploit an integer underflow vulnerability leading to denial of service.
Which versions of dnsmasq are affected by CVE-2017-14496?
Versions of dnsmasq prior to 2.78 are affected by CVE-2017-14496.
Can CVE-2017-14496 be exploited remotely?
Yes, CVE-2017-14496 can be exploited remotely through crafted DNS requests.
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