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Fencer Vulns
medium 6.5

CVE-2024-34055 json

Cyrus IMAP before 3.8.3 and 3.10.x before 3.10.0-rc1 allows authenticated attackers to cause unbounded memory allocation by sending many LI…

published 2024-06-05 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-35154

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

Cyrus IMAP before 3.8.3 and 3.10.x before 3.10.0-rc1 allows authenticated attackers to cause unbounded memory allocation by sending many LITERALs in a single command.

Patch / fix

  • cyrusimap cyrus_imap 3.8.3
  • cyrus-imapd Debian 12 3.6.1-4+deb12u2
  • cyrus-imapd Debian 14, Debian 13 3.8.3-1

debian advisories DEBIAN-CVE-2024-34055

  • cyrus-imapd Ubuntu Pro 22.04 LTS 3.4.3-3ubuntu0.1+esm1
  • cyrus-imapd Ubuntu Pro 24.04 LTS 3.8.2-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2024-34055

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

  • cyrus-imapd RHEL 9 3.4.8-1.el9
  • perl-Cyrus RHEL 9 3.4.8-1.el9
  • cyrus-imapd-libs RHEL 9 3.4.8-1.el9
  • cyrus-imapd-utils RHEL 9 3.4.8-1.el9

red hat advisories RHSA-2024:9195

  • cyrus-imapd openSUSE Tumbleweed 3.8.4-1.1

opensuse advisories openSUSE-SU-2025:14968-1

  • cyrus-imapd AlmaLinux 9 3.4.8-1.el9
  • perl-Cyrus AlmaLinux 9 3.4.8-1.el9
  • cyrus-imapd-libs AlmaLinux 9 3.4.8-1.el9
  • cyrus-imapd-utils AlmaLinux 9 3.4.8-1.el9

almalinux advisories ALSA-2024:9195

  • cyrus-imapd Rocky Linux 9 3.4.8-1.el9

rocky linux advisories RLSA-2024:9195

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-2024-34055 updated cvss 6.5

cyrus-imapd: unbounded memory allocation by sending many LITERALs in a single command

  • Red Hat Enterprise Linux 6 cyrus-imapd, cyrus-imapd-utils Red Hat Enterprise Linux 7 cyrus-imapd, cyrus-imapd-utils
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 cyrus-imapd, cyrus-imapd-vzic, cyrus-imapd-utils
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 9) perl-Cyrus 3.4.8-1.el9, cyrus-imapd 3.4.8-1.el9, cyrus-imapd-libs 3.4.8-1.el9, cyrus-imapd-utils 3.4.8-1.el9
    fixed: vendor fix RHSA-2024:9195
  • Red Hat Enterprise Linux 10 cyrus-imapd
    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
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.84% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

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.