Bug 2267497 (CVE-2024-27354)

Summary:	CVE-2024-27354 php-phpseclib: denial of service
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php-phpseclib 1.0.23, php-phpseclib 2.0.47, php-phpseclib 3.0.36	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2267499, 2267498
Bug Blocks:

Description ybuenos 2024-03-03 07:56:21 UTC

An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate containing an extremely large prime to cause a denial of service (CPU consumption for an isPrime primality check). NOTE: this issue was introduced when attempting to fix CVE-2023-27560.

https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49

Comment 1 ybuenos 2024-03-03 07:56:39 UTC

Created php-phpseclib tracking bugs for this issue:

Affects: epel-all [bug 2267499]
Affects: fedora-all [bug 2267498]