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Fencer Vulns
medium 5.5

CVE-2020-21683 json

A global buffer overflow in the shade_or_tint_name_after_declare_color in genpstricks.c of fig2dev 3.2.7b allows attackers to cause a denia…

published 2021-08-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-14451

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

A global buffer overflow in the shade_or_tint_name_after_declare_color in genpstricks.c of fig2dev 3.2.7b allows attackers to cause a denial of service (DOS) via converting a xfig file into pstricks format.

Patch / fix

  • fig2dev Debian 14, Debian 13, Debian 12 1:3.2.8-1

debian advisories DEBIAN-CVE-2020-21683

  • fig2dev Ubuntu Pro 18.04 LTS 1:3.2.6a-6ubuntu1.1+esm1
  • fig2dev Ubuntu Pro 20.04 LTS 1:3.2.7a-7ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2020-21683

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

  • transfig SLE Workstation Extension 15 SP3, SLE Workstation Extension 15 SP2 3.2.8b-4.15.1
  • transfig SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 3.2.8a-1.160.13.1
  • transfig SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +10 more 3.2.8a-2.17.1

suse advisories SUSE-SU-2021:3584-1SUSE-SU-2021:14823-1SUSE-SU-2021:3124-1

  • transfig openSUSE Tumbleweed 3.2.8a-5.1
  • transfig Package Hub 15 SP3, openSUSE Leap 15.3 3.2.8b-bp153.3.6.3
  • transfig Package Hub 15 SP2 3.2.8b-bp152.3.6.2
  • transfig openSUSE Leap 15.2 3.2.8b-lp152.6.9.1
  • transfig openSUSE Leap 15.3 3.2.8b-4.15.1

opensuse advisories openSUSE-SU-2024:11472-1openSUSE-SU-2021:1481-1openSUSE-SU-2021:1458-1openSUSE-SU-2021:1439-1openSUSE-SU-2021:3584-1

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-2020-21683 updated cvss 5.5

transfig: A global buffer overflow in the shade_or_tint_name_after_declare_color in genpstricks.c could result in a denial of service

  • Red Hat Enterprise Linux 6 transfig Red Hat Enterprise Linux 7 transfig
    affected: no fix planned “Out of support scope”

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

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/mcj/tickets/77/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/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-120 Buffer Copy without Checking Size of Input

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.