CVE-2011-4566

Exp

Integer overflow in the exif_process_IFD_TAG function in exif.c in the exif extension in PHP 5.4.0beta2 on 32-bit platforms allows remote attackers to read the contents of arbitrary memory locations or cause a denial of service via a crafted offset_val value in an EXIF header in a JPEG file, a different vulnerability than CVE-2011-0708.

Published: 2011-11-29 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4566 is rated High Exploit Risk (74/100): CVSS Medium severity, with high exploitation likelihood (EPSS 36.44%, 97th percentile). 1 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-2011-4566

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-4566

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 2026-05-31 37.10% 36.44% -0.66%
2 2026-03-05 38.91% 37.10% -1.81%
3 2026-02-20 — 38.91% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4566

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2011-4566

OS Trackers for CVE-2011-4566

vendor priority summary link
gentoo high CVE-2011-4566: 1 GLSA(s) (201209-03), 1 atom(s) (dev-lang/php); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4566
redhat medium — https://access.redhat.com/security/cve/CVE-2011-4566
suse medium CVE-2011-4566 severity moderate: SUSE including 581 source package names (apache2-mod_php5-5.2.14-0.7.30.34.1, apache2-mod_php5-5.6.28-1.1, …), 882 product×package rows across 24 product lines (SUSE Enterprise Storage 7.1, SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS, … (24 product lines)): Known Not Affected 456, Fixed 426. https://www.suse.com/security/cve/CVE-2011-4566/
ubuntu medium CVE-2011-4566 medium priority: Ubuntu including 1 source packages (php5), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 5, needs-triage 1. https://ubuntu.com/security/CVE-2011-4566

NVD evaluator notes for CVE-2011-4566

Impact: Per: https://bugs.php.net/bug.php?id=60150 'The bug is only present in 32 bits version.'

Affected software / configurations for CVE-2011-4566

Vendor Product Version Raw CPE
php php >= 5.3.0, < 5.3.9 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php 5.4.0 cpe:2.3:a:php:php:5.4.0:beta2:*:*:*:*:*:*
debian debian_linux 5.0 cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
canonical ubuntu_linux 8.04 cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:*
canonical ubuntu_linux 10.04 cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
canonical ubuntu_linux 10.10 cpe:2.3:o:canonical:ubuntu_linux:10.10:*:*:*:*:*:*:*
canonical ubuntu_linux 11.04 cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*
canonical ubuntu_linux 11.10 cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*

References for CVE-2011-4566

URL Tags
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00016.html Mailing List Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2012-0071.html Third Party Advisory
http://secunia.com/advisories/47253 Third Party Advisory
http://secunia.com/advisories/48668 Third Party Advisory
http://support.apple.com/kb/HT5281 Third Party Advisory
http://www.debian.org/security/2012/dsa-2399 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2011:197 Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2012-0019.html Third Party Advisory
http://www.securityfocus.com/bid/50907 Third Party Advisory VDB Entry
https://bugs.php.net/bug.php?id=60150 Exploit Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/71612 Third Party Advisory VDB Entry
https://www.ubuntu.com/usn/USN-1307-1/ Third Party Advisory
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