NULL Pointer Dereference Affecting poppler package, versions <0.71.0-4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published1 Aug 2026
- disclosed26 Dec 2018
Introduced: 26 Dec 2018
CVE-2018-20481 (opens in a new tab)How to fix?
Upgrade Echo:latest poppler to version 0.71.0-4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream poppler package and not the poppler package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
XRef::getEntry in XRef.cc in Poppler 0.72.0 mishandles unallocated XRef entries, which allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted PDF document, when XRefEntry::setFlag in XRef.h is called from Parser::makeStream in Parser.cc.
References
- https://advisory.echohq.com/cve/CVE-2018-20481
- http://www.securityfocus.com/bid/106321
- https://access.redhat.com/errata/RHSA-2019:2022
- https://access.redhat.com/errata/RHSA-2019:2713
- https://gitlab.freedesktop.org/poppler/poppler/issues/692
- https://gitlab.freedesktop.org/poppler/poppler/merge_requests/143
- https://lists.debian.org/debian-lts-announce/2019/03/msg00008.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00018.html
- https://usn.ubuntu.com/3865-1/