SB2019061626 - Improper input validation in graphicsmagick (Alpine package)

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2018-20189)

CWE-ID: CWE-20 - Improper input validation

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

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

The vulnerability exists due to an error in the ReadDIBImage function of coders/dib.c when processing malicious input in DIB reader. A remote attacker can cause the service to crash via a dib file that is crafted to appear with direct pixel values and also colormapping (which is not available beyond 8-bits/sample), and therefore lacks indexes initialization.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=d0ff5181c1c8b82644c23b856065eb40b0811dc3
• https://git.alpinelinux.org/aports/commit/?id=6b4a2e3bab6c54afe6722bda8e75833c8d80778b
• https://git.alpinelinux.org/aports/commit/?id=f2ad329cc3291f5c66a6c324a27a44cfe0c42c5e