CVE-2011-4315

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.

Published: 2011-12-08 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4315 is rated Moderate Risk (57.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.81%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-4315

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-28 2.49% 2.81% +0.32%
2 2025-12-27 2.81% 2.49% -0.32%
3 2025-10-28 — 2.81% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4315

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2011-4315

OS Trackers for CVE-2011-4315

vendor priority summary link
debian low CVE-2011-4315 low priority: Debian including 1 source packages (nginx), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-4315
gentoo high CVE-2011-4315: 1 GLSA(s) (201203-22), 1 atom(s) (www-servers/nginx); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4315
suse medium — https://www.suse.com/security/cve/CVE-2011-4315/
ubuntu low CVE-2011-4315 low priority: Ubuntu including 1 source packages (nginx), 7 status rows across 7 suites (hardy, lucid, maverick, natty, oneiric, precise, upstream): released 4, ignored 2, not-affected 1. https://ubuntu.com/security/CVE-2011-4315

Affected software / configurations for CVE-2011-4315

Vendor Product Version Raw CPE
f5 nginx >= 0.6.18, < 1.0.10 cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
f5 nginx >= 1.1.0, <= 1.1.7 cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
fedoraproject fedora 16 cpe:2.3:o:fedoraproject:fedora:16:*:*:*:*:*:*:*
suse studio 1.2 cpe:2.3:a:suse:studio:1.2:*:*:*:standard:*:*:*
suse studio_onsite 1.2 cpe:2.3:a:suse:studio_onsite:1.2:*:*:*:*:*:*:*
suse webyast 1.2 cpe:2.3:a:suse:webyast:1.2:*:*:*:*:*:*:*

References for CVE-2011-4315

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070569.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00005.html Mailing List Third Party Advisory
http://openwall.com/lists/oss-security/2011/11/17/10 Mailing List Patch Third Party Advisory
http://openwall.com/lists/oss-security/2011/11/17/8 Mailing List Patch Third Party Advisory
http://secunia.com/advisories/47097 Third Party Advisory
http://secunia.com/advisories/48577 Third Party Advisory
http://security.gentoo.org/glsa/glsa-201203-22.xml Third Party Advisory
http://trac.nginx.org/nginx/changeset/4268/nginx Issue Tracking Patch Vendor Advisory
http://www.nginx.org/en/CHANGES-1.0 Release Notes Vendor Advisory
http://www.securityfocus.com/bid/50710 Third Party Advisory VDB Entry
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