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Fencer Intel
medium 5.5

CVE-2022-4121 json

In libetpan a null pointer dereference in mailimap_mailbox_data_status_free in low-level/imap/mailimap_types.c was found that could lead to…

published 3y ago modified 4mo ago also EUVD-2022-51488

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

In libetpan a null pointer dereference in mailimap_mailbox_data_status_free in low-level/imap/mailimap_types.c was found that could lead to a remote denial of service or other potential consequences.

Patch / fix

  • libetpan Debian 14, Debian 13, Debian 12 1.9.4-3.1

debian advisories DEBIAN-CVE-2022-4121

  • libetpan Ubuntu 22.04 LTS 1.9.4-3+deb11u1build0.22.04.1
  • libetpan Ubuntu Pro 16.04 LTS 1.6-1ubuntu0.1+esm1
  • libetpan Ubuntu Pro 18.04 LTS 1.8.0-1ubuntu0.1~esm1
  • libetpan Ubuntu Pro 20.04 LTS 1.9.4-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2022-4121

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-2022-4121 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-2022-4121 updated cvss 7.5

libetpan: Null pointer dereference in mailimap_mailbox_data_status_free in low-level/imap/mailimap_types.c

  • 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
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/dinhvh/libetpan/issues/420 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • n/a libetpan

Classification

Weakness

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.