What’s Vulnerable › Vulnerabilities

CVE-2018-20481

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-26 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Debian Linux: 8.0
• poppler: 0.72.0

References

• 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/
• 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

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