CVE-2021-21708
CVSS V2 Medium 6.8
CVSS V3 Critical 9.8
Description
In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.
Overview
- CVE ID
- CVE-2021-21708
- Assigner
- security@php.net
- Vulnerability Status
- Analyzed
- Published Version
- 2022-02-27T08:15:06
- Last Modified Date
- 2022-10-07T14:31:22
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.28 |
| cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | 1 | OR | 8.0.0 | 8.0.16 |
| cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | 1 | OR | 8.1.0 | 8.1.3 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 6.8
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 9.8
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://bugs.php.net/bug.php?id=81708 | Exploit Issue Tracking Patch Vendor Advisory |
| https://security.gentoo.org/glsa/202209-20 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220325-0004/ | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-21708 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21708 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-04-04 00:42:18 | Added to TrackCVE | |||
| 2022-12-06 10:55:32 | 2022-02-27T08:15Z | 2022-02-27T08:15:06 | CVE Published Date | updated |
| 2022-12-06 10:55:32 | 2022-10-07T14:31:22 | CVE Modified Date | updated | |
| 2022-12-06 10:55:32 | Analyzed | Vulnerability Status | updated | |
| 2022-12-06 10:55:37 | References | updated |