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Fencer Intel
medium 5.8

CVE-2021-40403 json

An information disclosure vulnerability exists in the pick-and-place rotation parsing functionality of Gerbv 2.7.0 and dev (commit b5f1eacd…

published 4y ago modified 4mo ago also EUVD-2021-27580

cvss
5.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

An information disclosure vulnerability exists in the pick-and-place rotation parsing functionality of Gerbv 2.7.0 and dev (commit b5f1eacd), and Gerbv forked 2.8.0. A specially-crafted pick-and-place file can exploit the missing initialization of a structure to leak memory contents. An attacker can provide a malicious file to trigger this vulnerability.

Patch / fix

  • gerbv Debian 13, Debian 12 2.9.2-1

debian advisories DEBIAN-CVE-2021-40403

  • gerbv Ubuntu 20.04 LTS 2.7.0-1ubuntu0.1
  • gerbv Ubuntu Pro 14.04 LTS 2.6.0-1ubuntu0.14.04.1~esm1
  • gerbv Ubuntu Pro 16.04 LTS 2.6.0-1ubuntu0.16.04.1~esm1
  • gerbv Ubuntu Pro 18.04 LTS 2.6.1-3ubuntu0.1~esm1
  • gerbv Ubuntu Pro 22.04 LTS 2.8.2-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-40403

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

Is CVE-2021-40403 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.

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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-2021-40403 updated cvss 5.8

gerbv: pick-and-place rotation parsing use of uninitialized variable vulnerability

  • 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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2021-1417 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 5.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
NVD 3.1 6.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • n/a Gerbv

Classification

Weakness
  • CWE-456 Missing Initialization of a Variable
  • CWE-909 Missing Initialization of Resource

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.