SB2018111452 - Fedora 27 update for libtiff

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Main Vulnerability Database SB2018111452

SB2018111452 - Fedora 27 update for libtiff

Published: November 14, 2018 Updated: April 24, 2025

Security Bulletin ID SB2018111452
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

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

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2018-18557)

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

The vulnerability exists due to decoding of arbitrarily-sized JBIG into a buffer, ignoring the buffer size. A remote unauthenticated attacker can supply specially crafted input, trigger a tif_jbig.c JBIGDecode out-of-bounds write and execute arbitrary code with elevated privileges.

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


2) Null pointer dereference (CVE-ID: CVE-2018-18661)

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to NULL pointer dereference in the function LZWDecode in the file tif_lzw.c. A remote attacker can trick the victim into opening a specially crafted input, trigger NULL pointer dereference and cause the service to crash.


Remediation

Install update from vendor's website.

References