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Fencer Vulns
medium 6.5

CVE-2020-36023 json

An issue was discovered in freedesktop poppler version 20.12.1, allows remote attackers to cause a denial of service (DoS) via crafted .pdf…

published 2023-08-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23606

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

An issue was discovered in freedesktop poppler version 20.12.1, allows remote attackers to cause a denial of service (DoS) via crafted .pdf file to FoFiType1C::cvtGlyph function.

Patch / fix

  • poppler Debian 14, Debian 13, Debian 12 22.08.0-2

debian advisories DEBIAN-CVE-2020-36023

  • poppler Ubuntu 20.04 LTS 0.86.1-0ubuntu1.3
  • poppler Ubuntu Pro 16.04 LTS 0.41.0-0ubuntu1.16+esm3
  • poppler Ubuntu Pro 18.04 LTS 0.62.0-2ubuntu2.14+esm1

ubuntu advisories UBUNTU-CVE-2020-36023

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • poppler SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 +2 more 0.79.0-150200.3.26.1
  • poppler SLE Software Development Kit 12 SP5 0.24.4-14.41.1
  • poppler SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 0.43.0-16.40.1
  • poppler-qt SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 0.43.0-16.40.1
  • poppler openSUSE Leap 15.4 0.62.0-150000.4.28.2

suse advisories SUSE-SU-2023:4562-1SUSE-SU-2023:4546-1SUSE-SU-2023:4362-1SUSE-SU-2023:4187-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-36023 updated cvss 5.5

poppler: Stack-Overflow in `FoFiType1C::cvtGlyph`

  • Red Hat Enterprise Linux 6 poppler, poppler-qt, poppler-qt4, poppler-glib, poppler-utils Red Hat Enterprise Linux 7 poppler, poppler-qt, poppler-cpp, poppler-glib, poppler-demos, poppler-utils
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils Red Hat Enterprise Linux 9 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.freedesktop.org https://gitlab.freedesktop.org/poppler/poppler/-/issues/1013 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.