CVE-2018-20551 — A reachable Object::getString assertion in Poppler 0

A reachable Object::getString assertion in Poppler 0.72.0 allows attackers to cause a denial of service due to construction of invalid rich media annotation assets in the AnnotRichMedia class in Annot.c.

01What is this vulnerability?

A reachable Object::getString assertion in Poppler 0.72.0 allows attackers to cause a denial of service due to construction of invalid rich media annotation assets in the AnnotRichMedia class in Annot.c.

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: 2018-12-28T04:00:00.000Z
• Last modified: 2024-08-05T12:05:17.424Z

09References

• gitlab.freedesktop.org — https://gitlab.freedesktop.org/poppler/poppler/merge_requests/146
• usn.ubuntu.com — https://usn.ubuntu.com/3886-1/
• gitlab.freedesktop.org — https://gitlab.freedesktop.org/poppler/poppler/issues/703
• access.redhat.com — https://access.redhat.com/errata/RHSA-2019:2713