PEAR Archive_Tar Improper Link Resolution Vulnerability
PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. 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.
A remote attacker, without authentication, can achieve partial data exposure, arbitrary modification of data. Federal agencies are required to remediate by 2022-09-15 under CISA BOD 22-01.
This is a Path Traversal (CWE-22) vulnerability in PEAR Archive_Tar. Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.
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Phishing link
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Malicious file
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Server compromised
Probably yes if any of these apply:
CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-08-25 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-09-15.
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply updates per vendor instructions.
References
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References