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Fencer Intel
medium 6.5

CVE-2018-20797 json

An issue was discovered in PoDoFo 0.9.6.

published 7y ago modified 4mo ago also EUVD-2018-13340

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

An issue was discovered in PoDoFo 0.9.6. There is an attempted excessive memory allocation in PoDoFo::podofo_calloc in base/PdfMemoryManagement.cpp when called from PoDoFo::PdfPredictorDecoder::PdfPredictorDecoder in base/PdfFiltersPrivate.cpp.

Patch / fix

  • libpodofo Ubuntu Pro 16.04 LTS 0.9.3-4ubuntu0.1~esm1
  • libpodofo Ubuntu Pro 18.04 LTS 0.9.5-9ubuntu0.1~esm1
  • libpodofo Ubuntu Pro 20.04 LTS 0.9.6+dfsg-5ubuntu0.1~esm1
  • libpodofo Ubuntu Pro 22.04 LTS 0.9.7+dfsg-3ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-20797

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

  • podofo SLE Module for Package Hub 15 SP6, SLE Module for Package Hub 15 SP5, openSUSE Leap 15.6 +1 more 0.9.6-150300.3.9.1

suse advisories SUSE-SU-2024:2137-1

  • podofo-0_10 openSUSE Tumbleweed 0.10.5-1.1
  • podofo openSUSE Tumbleweed 0.9.8-1.1

opensuse advisories openSUSE-SU-2025:15521-1openSUSE-SU-2024:12049-1

  • podofo Alpine 3.24, Alpine 3.23, Alpine 3.22 +9 more 0.9.7-r0

alpine advisories ALPINE-CVE-2018-20797

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2018-20797 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2018-20797 updated cvss 3.3

podofo: excessive memory allocation in PoDoFo::podofo_calloc in base/PdfMemoryManagement.cpp

  • Red Hat All currently supported Red Hat products
    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

Exploit prediction

1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/podofo/tickets/34/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel 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.