CVE-2021-21704
Last modified
CVE-2021-21704 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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.. EPSS estimates a 1.73% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Php | Php | >= 7.3.0, < 7.3.29 |
| Php | Php | >= 7.4.0, < 7.4.21 |
| Php | Php | >= 8.0.0, < 8.0.8 |
| Netapp | Clustered Data Ontap | All versions |
References
- https://bugs.php.net/bug.php?id=76448Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugs.php.net/bug.php?id=76449Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugs.php.net/bug.php?id=76450Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugs.php.net/bug.php?id=76452Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202209-20Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211029-0006/Third Party Advisory
- https://bugs.php.net/bug.php?id=76448Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugs.php.net/bug.php?id=76449Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugs.php.net/bug.php?id=76450Exploit, Issue Tracking, Patch, Vendor Advisory
- https://bugs.php.net/bug.php?id=76452Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202209-20Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211029-0006/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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