CVE-2021-21704
Multiple vulnerabilities in Firebird client extension
5.9
MEDIUM
CVSS 3.1
EPSS 1.7%
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.
How to fix CVE-2021-21704
To remediate CVE-2021-21704, upgrade the affected package to a fixed version below.
- —upgrade to 7.3.29 or later
- —upgrade to 7.3.29 or later
- —upgrade to 7.3.29 or later
- —upgrade to 7.3.29-1~deb10u1 or later
- —upgrade to 7.4.21-1+deb11u1 or later
Is CVE-2021-21704 being exploited?
Low — EPSS is 1.7%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- >= 7.3.0, < 7.3.29, >= 7.4.0, < 7.4.21, >= 8.0.0, < 8.0.8
- >= 7.3.0, < 7.3.29, >= 7.4.0, < 7.4.21, >= 8.0.0, < 8.0.8
- >= 7.3.0, < 7.3.29, >= 7.4.0, < 7.4.21, >= 8.0.0, < 8.0.8
- from 0, < 7.3.29-1~deb10u1
- from 0, < 7.4.21-1+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |