CVE-2020-15900

Publication date 28 July 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A memory corruption issue was found in Artifex Ghostscript 9.50 and 9.52. Use of a non-standard PostScript operator can allow overriding of file access controls. The ‘rsearch’ calculation for the ‘post’ size resulted in a size that was too large, and could underflow to max uint32_t. This was fixed in commit 5d499272b95a6b890a1397e11d20937de000d31b.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ghostscript	20.04 LTS focal	Fixed 9.50~dfsg-5ubuntu4.1
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

sbeattie

according to debian, jntroduced by 7ecbfda92b4c8dbf6f6c2bf8fc82020a29219eff (9.28rc1)

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
ghostscript	Upstream: 5d49927

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-4445-1
Ghostscript vulnerability
3 August 2020