SB2020040315 - Ubuntu update for GD Graphics Library

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Main Vulnerability Database SB2020040315

SB2020040315 - Ubuntu update for GD Graphics Library

Published: April 3, 2020

Security Bulletin ID SB2020040315
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

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

Description

This security bulletin contains information about 2 vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2018-14553)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the gdImageClone() function in gd.c file in libgd. A remote attacker can trigger denial of service conditions via a specific function call sequence. Only affects PHP when linked with an external libgd (not bundled).


2) Out-of-bounds read (CVE-ID: CVE-2019-11038)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the gdImageCreateFromXbm() function in the GD Graphics Library (aka LibGD). A remote attacker can create a specially crafted image, pass it to the affected application, trigger out-of-bounds read error and read contents of memory on the system.




Remediation

Install update from vendor's website.

References