ALPINE-CVE-2021-21708

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Source
https://security.alpinelinux.org/vuln/CVE-2021-21708
Import Source
https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21708.json
JSON Data
https://api.osv.dev/v1/vulns/ALPINE-CVE-2021-21708
Upstream
Published
2022-02-27T08:15:06Z
Modified
2026-11-03T06:32:31Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Alpine:v3.14 / php7

Package

Name
php7
Purl
pkg:apk/alpine/php7?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
7.4.32-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21708.json"

Alpine:v3.15 / php7

Package

Name
php7
Purl
pkg:apk/alpine/php7?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
7.4.28-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21708.json"

Alpine:v3.15 / php8

Package

Name
php8
Purl
pkg:apk/alpine/php8?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.0.16-r0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-21708.json"