erroneo.us
Search all guides⌘K

Security Digest · Critical advisory (no CVE assigned)

GHSA-cc97-g92w-jm65: TYPO3 CMS Insecure Deserialization & Arbitrary Code Execution

Phar files (formerly known as "PHP archives") can act als self extracting archives which leads to the fact that source code is executed when Phar files are invoked.

CVSS 9.8 Critical GitHub-reviewed · critical

Published By erroneo.us Security DeskSeen in the digest for May 30, 2024

Should you act?

  • Only if you depend on one of the packages below, directly or transitively, in a vulnerable version. Check your lockfile with composer audit.
  • No CVE has been assigned, so it will not appear in CVE-based scanners that ignore GitHub advisories. npm audit, pip-audit and Dependabot do read GitHub advisories.

Affected packages

EcosystemPackageVulnerableFirst fixed
Composer (PHP)typo3/cms-core>= 8.0.0, < 8.7.178.7.17
Composer (PHP)typo3/cms-core>= 9.0.0, < 9.3.29.3.2
Composer (PHP)typo3/cms-core>= 7.0.0, < 7.6.307.6.30

Details

Phar files (formerly known as "PHP archives") can act als self extracting archives which leads to the fact that source code is executed when Phar files are invoked. The Phar file format is not limited to be stored with a dedicated file extension - "bundle.phar" would be valid as well as "bundle.txt" would be. This way, Phar files can be obfuscated as image or text file which would not be denied from being uploaded and persisted to a TYPO3 installation. Due to a missing sanitization of user input, those Phar files can be invoked by manipulated URLs in TYPO3 backend forms. A valid backend user account is needed to exploit this vulnerability. In theory the attack vector would be possible in the TYPO3 frontend as well, however no functional exploit has been identified so far.

CVSS: 9.8 (v3.1) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Sources and references

  1. GitHub Advisory GHSA-cc97-g92w-jm65 github.com
  2. github.com github.com
  3. github.com github.com
  4. github.com github.com
  5. github.com github.com
  6. github.com github.com
  7. typo3.org typo3.org

Critical Composer (PHP) advisories · Today’s Security Digest