How severe is CVE-2011-4153?

CVE-2011-4153 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4153 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4153?

CVE-2011-4153 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-4153?

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

When was CVE-2011-4153 published?

CVE-2011-4153 was published on 2012-01-18 and last updated on 2026-06-16.

CVE-2011-4153

CVE-2011-4153 is a medium-severity vulnerability in Php with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Php
Published: 2012-01-18
Last modified: 2026-06-16

Description

PHP 5.3.8 does not always check the return value of the zend_strndup function, which might allow remote attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted input to an application that performs strndup operations on untrusted string data, as demonstrated by the define function in zend_builtin_functions.c, and unspecified functions in ext/soap/php_sdl.c, ext/standard/syslog.c, ext/standard/browscap.c, ext/oci8/oci8.c, ext/com_dotnet/com_typeinfo.c, and main/php_open_temporary_file.c.

Frequently asked questions

What is CVE-2011-4153?: PHP 5.3.8 does not always check the return value of the zend_strndup function, which might allow remote attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted input to an application that performs strndup operations on untrusted string data, as demonstrated by the define function in zend_builtin_functions.c, and unspecified functions in ext/soap/php_sdl.c, ext/standard/syslog.c, ext/standard/browscap.c, ext/oci8/oci8.c, ext/com_dotnet/com_typeinfo.c, and main/php_open_temporary_file.c.
How severe is CVE-2011-4153?: CVE-2011-4153 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4153 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4153?: CVE-2011-4153 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-4153?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4153 published?: CVE-2011-4153 was published on 2012-01-18 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:php:php:5.3.8:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

179.125.175.74 (ipv4-addr)