All vulnerabilities
CVE-2020-28949

PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

PEAR Archive_Tar
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 25 Aug 2022CISA KEV
Exploit odds (EPSS)84.6%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline15 Sep 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 17 Nov 2020Exploit code publicMetasploit
  2. 19 Nov 2020, 18:14 UTCPublishedCVE List
  3. 25 Aug 2022Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Exploit modulePEAR Archive_Tar 1.4.10 Arbitrary File Write 17 Nov 2020Metasploit

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

PEAR Archive_Tar allows an unserialization attack because phar: is blocked but PHAR: is not blocked. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 14