NULL Pointer Dereference Affecting okular package, versions <0:4.10.5-7.el7
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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Test your applications- Snyk IDSNYK-RHEL7-OKULAR-4894214
- published26 Jul 2021
- disclosed20 Dec 2018
Introduced: 20 Dec 2018
CVE-2018-20481 (opens in a new tab)How to fix?
Upgrade RHEL:7 okular to version 0:4.10.5-7.el7 or higher.
This issue was patched in RHSA-2019:2022.
NVD Description
Note: Versions mentioned in the description apply only to the upstream okular package and not the okular package as distributed by RHEL.
See How to fix? for RHEL:7 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
- http://www.securityfocus.com/bid/106321
- https://access.redhat.com/security/cve/CVE-2018-20481
- 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://access.redhat.com/errata/RHSA-2019:2022
- https://usn.ubuntu.com/3865-1/