DEBIAN-CVE-2021-21708

DEBIAN-CVE-2021-21708 PUBLISHED CVSS 9.800000190734863 CRITICAL

Record from OSV · Published February 27, 2022

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.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
php7.4	Debian:11	7.4.28-1+deb11u1

Risk scores

CVSS 3.1

9.800000190734863

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Vendor	Product	Versions
Debian:11	php7.4	0, 7.4.21-1+deb11u1, 7.4.25-1+deb11u1

Timeline

Feb 27, 2022 CVE Published
Aug 27, 2026 CVE Updated

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln DEBIAN-CVE-2021-21708
vulnetix vdb fixes DEBIAN-CVE-2021-21708

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curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/DEBIAN-CVE-2021-21708/fixes/registry"

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References

https://security-tracker.debian.org/tracker/CVE-2021-21708 advisory

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