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Vulnerability · Published Oct 4, 2021 · Assigned by php

CVE-2021-21704Multiple vulnerabilities in Firebird client extension

Medium 5.0

In plain English

A medium-severity out-of-bounds read in PHP from PHP Group. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium
Exploit odds (30 days)1.8%top 21.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
PHP Group PHP 7.3.x – before 7.3.297.4.x – before 7.4.218.0.X – before 8.0.8

Weakness: CWE-125, CWE-190 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

References