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CVE-2011-4153

35
FAUCET Score

CVE-2011-4153 describes a denial-of-service vulnerability in PHP 5.3.8, where the zend_strndup function's return value is not consistently checked. This oversight can lead to a NULL pointer dereference and application crash when processing crafted, untrusted string data in various PHP components. The vulnerability has a CVSS score of 5.0, indicating a medium severity with a network attack vector, low complexity, and potential for partial availability impact. While no active exploitation is confirmed, a public exploit (EDB-18370) exists, though community discussion and media coverage remain minimal.

Impacted Technologies

VendorProductVersion(s)CPE
5.3.8CPE matchmatch criteria
cpe:2.3:a:php:php:5.3.8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
12.20%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-18370 · Jan 14, 2012
This CVE's current EPSS score of 0.1220 is in the 95th percentile among its peer group of 23,684 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php-0:5.1.6-39.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php53-0:5.3.3-13.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php-0:5.3.3-14.el6_3
View patch

Vendor Advisories (1)

redhatCVE-2011-4153Low

php: zend_strndup() NULL pointer dereference may cause DoS

Jan 10, 2012

References

archives.neohapsis.com / archives/bugtraq/2012-01/0092.html
Exploit
cxsecurity.com / research/103
Exploit
h20000.www2.hp.com / bizsupport/TechSupport/Document.jsp
lists.opensuse.org / opensuse-security-announce/2012-03/msg00013.html
lists.opensuse.org / opensuse-security-announce/2012-03/msg00016.html
lists.opensuse.org / opensuse-security-announce/2012-04/msg00001.html
marc.info
secunia.com / advisories/48668
exploit-db.com / exploits/18370
Exploit