How severe is CVE-2011-4566?

CVE-2011-4566 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2011-4566 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4566?

CVE-2011-4566 primarily affects Php. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4566?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-4566 published?

CVE-2011-4566 was published on 2011-11-29 and last updated on 2026-06-16.

CVE-2011-4566

CVE-2011-4566 is a medium-severity vulnerability in Php with a CVSS 2.0 base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Php
Published: 2011-11-29
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2011-4566?: 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.
How severe is CVE-2011-4566?: CVE-2011-4566 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2011-4566 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4566?: CVE-2011-4566 primarily affects Php. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4566?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4566 published?: CVE-2011-4566 was published on 2011-11-29 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.4.0:beta2:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:10.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

221.161.235.168 (ipv4-addr)
103.20.122.54 (ipv4-addr)
220.88.220.59 (ipv4-addr)
211.253.10.61 (ipv4-addr)
121.132.27.238 (ipv4-addr)
179.125.175.74 (ipv4-addr)
121.78.158.30 (ipv4-addr)
14.63.192.228 (ipv4-addr)