PHP up to 7.4.27/8.0.15/8.1.2 FILTER_VALIDATE_FLOAT use after free
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.6 | $0-$5k | 0.04 |
A vulnerability classified as critical was found in PHP up to 7.4.27/8.0.15/8.1.2 (Programming Language Software). Affected by this vulnerability is an unknown functionality of the component FILTER_VALIDATE_FLOAT Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was published 02/27/2022 as 81708. It is possible to read the advisory at bugs.php.net. This vulnerability is known as CVE-2021-21708 since 01/04/2021. The technical details are unknown and an exploit is not publicly available.
Upgrading to version 7.4.28, 8.0.16 or 8.1.3 eliminates this vulnerability.
Product
Type
Name
Version
- 7.4.0
- 7.4.1
- 7.4.2
- 7.4.3
- 7.4.4
- 7.4.5
- 7.4.6
- 7.4.7
- 7.4.8
- 7.4.9
- 7.4.10
- 7.4.11
- 7.4.12
- 7.4.13
- 7.4.14
- 7.4.15
- 7.4.16
- 7.4.17
- 7.4.18
- 7.4.19
- 7.4.20
- 7.4.21
- 7.4.22
- 7.4.23
- 7.4.24
- 7.4.25
- 7.4.26
- 7.4.27
- 8.0.0
- 8.0.1
- 8.0.2
- 8.0.3
- 8.0.4
- 8.0.5
- 8.0.6
- 8.0.7
- 8.0.8
- 8.0.9
- 8.0.10
- 8.0.11
- 8.0.12
- 8.0.13
- 8.0.14
- 8.0.15
- 8.1.0
- 8.1.1
- 8.1.2
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.7VulDB Meta Temp Score: 7.6
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
CNA Base Score: 8.2
CNA Vector (PHP Group): 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Use after freeCWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: PHP 7.4.28/8.0.16/8.1.3
Timeline
01/04/2021 🔍02/27/2022 🔍
02/27/2022 🔍
03/03/2022 🔍
Sources
Product: php.orgAdvisory: 81708
Status: Confirmed
CVE: CVE-2021-21708 (🔍)
Entry
Created: 02/27/2022 13:52Updated: 03/03/2022 09:07
Changes: 02/27/2022 13:52 (50), 03/03/2022 09:07 (1)
Complete: 🔍
No comments yet. Languages: en.
Please log in to comment.