Vulnerability in Cyrus Imap
CVE-2021-33582
Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service (multiple-minute daemon hang) via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: +0.000
Affected products
- Cyrus Imap
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
References
- www.cyrusimap.org/imap/download/release-notes/index.html (Patch, Release Notes, Vendor Advisory)
- github.com/cyrusimap/cyrus-imapd/security/advisories (Third Party Advisory, Not Applicable)
- github.com/cyrusimap/cyrus-imapd/commits/master (Patch, Third Party Advisory)
- cyrus.topicbox.com/groups/announce/T3dde0a2352462975-M1386fc44adf967e072f8df13/… (Patch, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2022/06/msg00013.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33582?
- CVE-2021-33582 is a high-severity vulnerability in Cyrus Imap, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2021-09-01.
- How severe is CVE-2021-33582?
- High severity. CVSS v3 base score is 7.5 out of 10.