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Fencer Intel
medium 4.3

CVE-2011-3481 json

The index_get_ids function in index.c in imapd in Cyrus IMAP Server before 2.4.11, when server-side threading is enabled, allows remote att…

published 2011-09-14 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3444

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

The index_get_ids function in index.c in imapd in Cyrus IMAP Server before 2.4.11, when server-side threading is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted References header in an e-mail message.

Patch / fix

  • cyrus-imapd RHEL 4 2.2.12-17.el4
  • cyrus-imapd RHEL 5 2.3.7-12.el5_7.2
  • cyrus-imapd RHEL 6 2.3.16-6.el6_1.4
  • perl-Cyrus RHEL 4 2.2.12-17.el4
  • cyrus-imapd-nntp RHEL 4 2.2.12-17.el4
  • cyrus-imapd-perl RHEL 5 2.3.7-12.el5_7.2
  • cyrus-imapd-utils RHEL 4 2.2.12-17.el4
  • cyrus-imapd-utils RHEL 5 2.3.7-12.el5_7.2

red hat advisories RHSA-2011:1508

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-2011-3481 updated cvss 4.3

cyrus-imapd: NULL pointer dereference via crafted References header in email

  • Red Hat Enterprise Linux (v. 5 server) cyrus-imapd 2.3.7-12.el5_7.2, cyrus-imapd-perl 2.3.7-12.el5_7.2, cyrus-imapd-utils 2.3.7-12.el5_7.2 Red Hat Enterprise Linux AS version 4 perl-Cyrus 2.2.12-17.el4, cyrus-imapd 2.2.12-17.el4, cyrus-imapd-nntp 2.2.12-17.el4, cyrus-imapd-utils 2.2.12-17.el4, cyrus-imapd-murder 2.2.12-17.el4 Red Hat Enterprise Linux Desktop version 4 perl-Cyrus 2.2.12-17.el4, cyrus-imapd 2.2.12-17.el4, cyrus-imapd-nntp 2.2.12-17.el4, cyrus-imapd-utils 2.2.12-17.el4, cyrus-imapd-murder 2.2.12-17.el4 Red Hat Enterprise Linux ES version 4 perl-Cyrus 2.2.12-17.el4, cyrus-imapd 2.2.12-17.el4, cyrus-imapd-nntp 2.2.12-17.el4, cyrus-imapd-utils 2.2.12-17.el4, cyrus-imapd-murder 2.2.12-17.el4 Red Hat Enterprise Linux Server (v. 6) cyrus-imapd 2.3.16-6.el6_1.4, cyrus-imapd-utils 2.3.16-6.el6_1.4 Red Hat Enterprise Linux Server Optional (v. 6) cyrus-imapd 2.3.16-6.el6_1.4, cyrus-imapd-utils 2.3.16-6.el6_1.4
    +2 more products
    Red Hat Enterprise Linux WS version 4 perl-Cyrus 2.2.12-17.el4, cyrus-imapd 2.2.12-17.el4, cyrus-imapd-nntp 2.2.12-17.el4, cyrus-imapd-utils 2.2.12-17.el4, cyrus-imapd-murder 2.2.12-17.el4 Red Hat RHEL Desktop Workstation (v. 5 client) cyrus-imapd 2.3.7-12.el5_7.2, cyrus-imapd-perl 2.3.7-12.el5_7.2, cyrus-imapd-utils 2.3.7-12.el5_7.2
    fixed: vendor fix RHSA-2011:1508

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

2.14% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

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.