SB2020040708 - Multiple vulnerabilities in glibc 

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Main Vulnerability Database SB2020040708

SB2020040708 - Multiple vulnerabilities in glibc

Published: April 7, 2020 Updated: April 20, 2020

Security Bulletin ID SB2020040708
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) Use-after-free (CVE-ID: CVE-2020-1752)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the glob() function in glibc in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username are affected by this issue. A local user can create a specially crafted path that, when processed by the glob() function, would potentially lead to arbitrary code execution.


2) Out-of-bounds write (CVE-ID: CVE-2020-1751)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error in the "backtrace" function when handling signal trampolines on PowerPC. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.


Remediation

Install update from vendor's website.

References