SB2020121910 - Amazon Linux AMI update for libxslt

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Main Vulnerability Database SB2020121910

SB2020121910 - Amazon Linux AMI update for libxslt

Published: December 19, 2020

Security Bulletin ID SB2020121910
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11068)

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to an error within the xsltCheckRead() and xsltCheckWrite() functions when processing requests from remote servers. A remote attacker can trick the victim into opening a specially crafted URL that will result in "-1 error" code but the URL itself will be processed by the application later.

Successful exploitation of the vulnerability may allow an attacker to bypass certain security restrictions and perform XXE attacks.

2) Buffer overflow (CVE-ID: CVE-2019-18197)

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

The vulnerability exists due to a boundary error within the xsltCopyText() function in transform.c in libxslt. A remote attacker can create a specially crafted XML document, pass it to the affected application, trigger memory corruption and execute arbitrary code on the target system.

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


Remediation

Install update from vendor's website.

References