CVE-2021-21704

Medium

Description

In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using Firebird PDO driver extension, a malicious database server could cause crashes in various database functions, such as getAttribute(), execute(), fetch() and others by returning invalid response data that is not parsed correctly by the driver. This can result in crashes, denial of service or potentially memory corruption.

SeverityMedium

CVSS5.0

Exploit probability79. percentile1.8%

Product

Php

PublishedOct 4, 2021

First seenOct 4, 2021

Weakness typeCWE-125Out-of-bounds read CWE-190Integer overflow

How to fix

Update

php php7.3.29, 7.4.21, 8.0.8 or later

Vendor advisories

security.gentoo.org/glsa/202209-20

Affected products

Product	Affected versions	Fixed in
php php	7.3.0 ≤ v < 7.3.29, 7.4.0 ≤ v < 7.4.21, 8.0.0 ≤ v < 8.0.8	7.3.29, 7.4.21, 8.0.8
netapp clustered_data_ontap	No range specified	—

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