CVE-2009-4418

UnknownEPSS 0.97%

Last modified

CVE-2009-4418 is a vulnerability of currently unknown severity. The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.

Metrics

EPSS Probability
0.97%

57.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
PhpPhp<= 5.3.0
PhpPhp5
PhpPhp5.0Rc1
PhpPhp5.0.0
PhpPhp5.0.1
PhpPhp5.0.2
PhpPhp5.0.3
PhpPhp5.0.4
PhpPhp5.0.5
PhpPhp5.1.0
PhpPhp5.1.1
PhpPhp5.1.2
PhpPhp5.1.3
PhpPhp5.1.4
PhpPhp5.1.5
PhpPhp5.1.6
PhpPhp5.2.0
PhpPhp5.2.1
PhpPhp5.2.2
PhpPhp5.2.3
PhpPhp5.2.4
PhpPhp5.2.5
PhpPhp5.2.6
PhpPhp5.2.7
PhpPhp5.2.8
PhpPhp5.2.9
PhpPhp5.2.10
PhpPhp5.2.11

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2009-4418?
The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.
How severe is CVE-2009-4418?
Severity scoring for CVE-2009-4418 is pending analysis. The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.
How do I fix CVE-2009-4418?
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.

Are you affected by CVE-2009-4418?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST