CVE-2011-3336

Exp

regcomp in the BSD implementation of libc is vulnerable to denial of service due to stack exhaustion.

Published: 2020-02-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3336 is rated High Exploit Risk (72.5/100): CVSS High severity, with high exploitation likelihood (EPSS 6.54%, 93th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2011-3336

EDB-ID Source Kind Published Link
36288 exploit_db edb 2011-11-04 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-3336

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 2026-06-15 24.64% 6.54% -18.10%
2 2025-12-28 23.65% 24.64% +0.99%
3 2025-12-27 — 23.65% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3336

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2011-3336

OS Trackers for CVE-2011-3336

vendor priority summary link
ubuntu medium CVE-2011-3336 medium priority: Ubuntu including 2 source packages (eglibc, glibc), 10 status rows across 5 suites (bionic, eoan, trusty, upstream, xenial): DNE 4, not-affected 4, needs-triage 2. https://ubuntu.com/security/CVE-2011-3336

Affected software / configurations for CVE-2011-3336

Vendor Product Version Raw CPE
php php >= 5.3.0, <= 5.3.10 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
apple mac_os_x >= 10.6.0, <= 10.7.2 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
freebsd freebsd 8.2 cpe:2.3:o:freebsd:freebsd:8.2:-:*:*:*:*:*:*
openbsd openbsd 5.0 cpe:2.3:o:openbsd:openbsd:5.0:*:*:*:*:*:*:*

References for CVE-2011-3336

URL Tags
http://seclists.org/fulldisclosure/2014/Mar/166 Exploit Mailing List Third Party Advisory
http://www.securityfocus.com/bid/50541 Exploit Third Party Advisory VDB Entry
https://cxsecurity.com/issue/WLB-2011110082 Exploit Third Party Advisory
https://www.securityfocus.com/archive/1/520390 Exploit Third Party Advisory VDB Entry
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