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CVE-2020-15900

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Date: July 28, 2020

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.

Language: C

Severity Score

Related Resources (16)

http://git.ghostscript.com/?p=ghostpdl.git;a=log
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=5d499272b95a6b890a1397e11d20937de000d31b
https://usn.ubuntu.com/4445-1/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-15900
https://security.alpinelinux.org/vuln/CVE-2020-15900
https://security-tracker.debian.org/tracker/CVE-2020-15900
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00004.html
https://github.com/ArtifexSoftware/ghostpdl/commits/master/psi/zstring.c
https://github.com/ArtifexSoftware/ghostpdl/commit/5d499272b95a6b890a1397e11d20937de000d31b
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00006.html
https://git.ghostscript.com/?p=ghostpdl.git%3Ba=commitdiff%3Bh=5d499272b95a6b890a1397e11d20937de000d31b
http://git.ghostscript.com/?p=ghostpdl.git%3Ba=log
https://nvd.nist.gov/vuln/detail/CVE-2020-15900
https://artifex.com/security-advisories/CVE-2020-15900
https://security.gentoo.org/glsa/202008-20
https://www.mend.io/vulnerability-database/CVE-2020-15900

Severity Score

Weakness Type (CWE)

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-119

Integer Underflow (Wrap or Wraparound)

CWE-191

Out-of-bounds Write

CWE-787

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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