CVE-2017-14496
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 2.78-1 | |
| debian | bookworm | fixed | 2.78-1 |
| debian | bullseye | fixed | 2.78-1 |
| debian | forky | fixed | 2.78-1 |
| debian | sid | fixed | 2.78-1 |
| debian | trixie | fixed | 2.78-1 |
| ubuntu | 14.04 | affected | |
| ubuntu | 16.04 | affected | |
| ubuntu | 17.04 | affected | |
| debian | 7.0 | affected | |
| debian | 7.1 | affected | |
| debian | 9.0 | affected | |
| rhel | 7.0 | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| thekelleys | dnsmasq | {"endIncluding":"2.77"} | |
References
- https://security.archlinux.org/ASA-201710-1
- 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%3Ba=commit%3Bh=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://access.redhat.com/errata/RHSA-2017:2836
- https://access.redhat.com/security/vulnerabilities/3199382
- https://cert-portal.siemens.com/productcert/pdf/ssa-689071.pdf
- https://security.gentoo.org/glsa/201710-27
- https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html
- 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%40lists.thekelleys.org.uk/msg11664.html
- https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg11665.html
- https://www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
- https://security-tracker.debian.org/tracker/CVE-2017-14496
CWEs
CWE-191
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.