CVE-2018-15908 — In Artifex Ghostscript 9

In Artifex Ghostscript 9.23 before 2018-08-23, attackers are able to supply malicious PostScript files to bypass .tempfile restrictions and write files.

01What is this vulnerability?

In Artifex Ghostscript 9.23 before 2018-08-23, attackers are able to supply malicious PostScript files to bypass .tempfile restrictions and write files.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-08-27T17:00:00.000Z
• Last modified: 2024-08-05T10:10:05.131Z

09References

• access.redhat.com — https://access.redhat.com/errata/RHSA-2018:3650
• git.ghostscript.com — http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=0d3901189f245232f0161a…
• security.gentoo.org — https://security.gentoo.org/glsa/201811-12
• usn.ubuntu.com — https://usn.ubuntu.com/3768-1/
• www.kb.cert.org — https://www.kb.cert.org/vuls/id/332928
• www.debian.org — https://www.debian.org/security/2018/dsa-4288
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/09/msg00015.html