CVE-2013-3735

HIGHCVSS 7.5/10EPSS 2.83%

Last modified

CVE-2013-3735 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment. NOTE: the vendor's http://php.net/security-note.php page says "for critical security situations you should be using OS-level security by running multiple web servers each as their own user id.. EPSS estimates a 2.83% chance of exploitation in the next 30 days.

Description

The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment. NOTE: the vendor's http://php.net/security-note.php page says "for critical security situations you should be using OS-level security by running multiple web servers each as their own user id.

Metrics

EPSS Probability
2.83%

84.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
PhpPhp<= 5.4.15Rc1
PhpPhp5.4.0—
PhpPhp5.4.1—
PhpPhp5.4.2—
PhpPhp5.4.3—
PhpPhp5.4.4—
PhpPhp5.4.5—
PhpPhp5.4.6—
PhpPhp5.4.7—
PhpPhp5.4.8—
PhpPhp5.4.9—
PhpPhp5.4.10—
PhpPhp5.4.11—
PhpPhp5.4.12—
PhpPhp5.4.13—
PhpPhp5.4.14—
PhpPhp<= 5.5.0Rc1
PhpPhp5.5.0Alpha1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2013-3735?
The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment. NOTE: the vendor's http://php.net/security-note.php page says "for critical security situations you should be using OS-level security by running multiple web servers each as their own user id.
How severe is CVE-2013-3735?
CVE-2013-3735 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.83% probability of exploitation in the next 30 days.
How do I fix CVE-2013-3735?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST