Vulnerability in Mutt
CVE-2020-14954
Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.023 (83.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Mutt
- Neomutt
- Canonical Ubuntu Linux — versions 12.04, 16.04, 18.04
- Debian Linux — versions 9.0, 10.0, 8.0
- Fedoraproject Fedora — versions 31, 32
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2020/dsa-4707 (vendor-advisory, Third Party Advisory)
- www.mutt.org/ (Product)
- gitlab.com/muttmua/mutt/-/issues/248 (Third Party Advisory, Issue Tracking)
- lists.mutt.org/pipermail/mutt-announce/Week-of-Mon-20200615/000023.html (Mailing List, Vendor Advisory)
- gitlab.com/muttmua/mutt/-/commit/c547433cdf2e79191b15c6932c57f1472bfb5ff4 (Patch)
- github.com/neomutt/neomutt/releases/tag/20200619 (Release Notes)
- github.com/neomutt/neomutt/commit/fb013ec666759cb8a9e294347c7b4c1f597639cc (Patch)
- www.debian.org/security/2020/dsa-4708 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00064.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00070.html (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-14954?
- CVE-2020-14954 is a medium-severity vulnerability in Mutt, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.9/10. Published 2020-06-21.
- How severe is CVE-2020-14954?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2020-14954 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.