CVE-2020-7065

Published: 1 April 2020

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.

Notes

Author	Note
sbeattie	PEAR issues should go against php-pear as of xenial

Priority

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package	Release	Status
php5 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Not vulnerable
	upstream	Needs triage
	xenial	Does not exist
php7.0 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Not vulnerable
php7.2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
php7.3 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Released (7.3.11-0ubuntu0.19.10.4)
	focal	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
php7.4 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Released (7.4.3-4ubuntu1.1)
	trusty	Does not exist
	upstream	Released (7.4.4)
	xenial	Does not exist

Severity score breakdown

Parameter	Value
Base score	8.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Bugs

https://bugs.php.net/bug.php?id=79371

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