SB2020120123 - Ubuntu update for php-pear 

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Main Vulnerability Database SB2020120123

SB2020120123 - Ubuntu update for php-pear

Published: December 1, 2020 Updated: April 23, 2025

Security Bulletin ID SB2020120123
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Deserialization of Untrusted Data (CVE-ID: CVE-2020-28948)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data, related to case sensitivity issues (e.g. "phar:" protocol is blocked, however  "PHAR:" is not). A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Input validation error (CVE-ID: CVE-2020-28949)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper sanitization of the user-supplied input when processing URI handlers in filenames. A remote attacker can pass the "file://" string in the filename and overwrite arbitrary files on the system.


Remediation

Install update from vendor's website.

References