CVE-2011-4315

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-12-08 · updated 2026-06-16
Weakness: CWE-787

Description

Heap-based buffer overflow in compression-pointer processing in core/ngx_resolver.c in nginx before 1.0.10 allows remote resolvers to cause a denial of service (daemon crash) or possibly have unspecified other impact via a long response.

Affected products

nginx: from 0.6.18 before 1.0.10; from 1.1.0 through 1.1.7 — fixed in 1.0.10
Fedoraproject Fedora: 16
SUSE Studio: 1.2
SUSE Studio onsite: 1.2
SUSE Webyast: 1.2

How to fix

Upgrade to a fixed version: nginx 1.0.10. Check the vendor advisory for mitigations.

References

http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070569.html
http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00005.html
http://openwall.com/lists/oss-security/2011/11/17/10
http://openwall.com/lists/oss-security/2011/11/17/8
http://secunia.com/advisories/47097
http://secunia.com/advisories/48577
http://security.gentoo.org/glsa/glsa-201203-22.xml
http://trac.nginx.org/nginx/changeset/4268/nginx
http://www.nginx.org/en/CHANGES-1.0
http://www.securityfocus.com/bid/50710
http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070569.html
http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00005.html

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