Arbitrary File Write Vulnerability in Archive_Tar By PEAR
CVE-2020-28949

7.8HIGH

Key Information:

Vendor: PHP
Status: Archive Tar
Vendor: CVE Published:; 19 November 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 93%🦅 CISA Reported

Summary

The Archive_Tar library, specifically versions up to 1.4.10, is susceptible to an arbitrary file write vulnerability. The sanitization of filenames is limited, as it primarily addresses PHAR attacks. This oversight allows attackers to exploit other stream-wrappers, such as 'file://', leading to potential unauthorized file overwrites. This vulnerability poses risks to systems utilizing the Archive_Tar library, requiring prompt remediation to prevent exploitation.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.