Description
The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nginx | 1.9.10-1 | — |
| Debian 13 | nginx | 1.9.10-1 | — |
| Debian 12 | nginx | 1.9.10-1 | — |
| Debian 8 | nginx | 1.6.2-5+deb8u1 | DSA-3473-1 |
| Debian 7 | nginx | 1.2.1-2.2+wheezy4 | DSA-3473-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | nginx | 1.9.10-0ubuntu1 | — |
| Ubuntu 14.04 LTS | nginx | 1.4.6-1ubuntu3.4 | USN-2892-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-nginx18-nginx | 1:1.8.1-1.el6 | RHSA-2016:1425 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE WebYast 1.3 | GeoIP | 1.4.7-2.10.1 | SUSE-SU-2016:1232-1 |
| SUSE WebYast 1.3 | nginx-1.0 | 1.0.15-0.29.2 | SUSE-SU-2016:1232-1 |
| SUSE Studio Onsite 1.3 | GeoIP | 1.4.7-2.10.1 | SUSE-SU-2016:1232-1 |
| SUSE Studio Onsite 1.3 | nginx-1.0 | 1.0.15-0.29.2 | SUSE-SU-2016:1232-1 |
| SUSE Lifecycle Management Server 1.3 | GeoIP | 1.4.7-2.10.1 | SUSE-SU-2016:1232-1 |
| SUSE Lifecycle Management Server 1.3 | nginx-1.0 | 1.0.15-0.29.2 | SUSE-SU-2016:1232-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nginx | 1.11.4-2.5 | openSUSE-SU-2024:10044-1 |
Advisories 5
- RHSA-2016:1425 Red Hat Security Advisory: rh-nginx18-nginx security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-3473-1 nginx - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2892-1 nginx vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2016:1232-1 Security update for nginx-1.0 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10044-1 nginx-1.11.4-2.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- openSUSE-SU-2016:0371 vendor-advisory
- https://bto.bluecoat.com/security-advisory/sa115
- GLSA-201606-06 vendor-advisory
- 1034869 vdb-entry
- [nginx] 20160126 nginx security advisory (CVE-2016-0742, CVE-2016-0746, CVE-2016-0747) mailing-list
- RHSA-2016:1425 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1302589
- DSA-3473 vendor-advisory
- USN-2892-1 vendor-advisory
- https://support.apple.com/kb/HT212818
- 20210921 APPLE-SA-2021-09-20-4 Xcode 13 mailing-list