CVE-2020-28896
Last modified
CVE-2020-28896 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an IMAP server's initial server response was invalid. The connection was not properly closed, and the code could continue attempting to authenticate. EPSS estimates a 2.32% chance of exploitation in the next 30 days.
Description
Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an IMAP server's initial server response was invalid. The connection was not properly closed, and the code could continue attempting to authenticate. This could result in authentication credentials being exposed on an unencrypted connection, or to a machine-in-the-middle.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mutt | Mutt | < 2.0.2 |
| Neomutt | Neomutt | < 2020-11-20 |
| Debian | Debian Linux | 9.0 |
References
- https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4b06Patch, Third Party Advisory
- https://github.com/neomutt/neomutt/releases/tag/20201120Release Notes, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59aPatch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/d92689088dfe80a290ec836e292376e2d9984f8fPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00048.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202101-32Third Party Advisory
- https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4b06Patch, Third Party Advisory
- https://github.com/neomutt/neomutt/releases/tag/20201120Release Notes, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59aPatch, Third Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/d92689088dfe80a290ec836e292376e2d9984f8fPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00048.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202101-32Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-28896?
How severe is CVE-2020-28896?
How do I fix CVE-2020-28896?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2020
- CVE-2020-28877Buffer overflow in in the copy_msg_element function for the …9.8
- CVE-2020-2888Vulnerability in the Oracle Marketing product of Oracle E-Bu…5.3
- CVE-2020-28884Liferay Portal Server tested on 7.3.5 GA6, 7.2.0 GA1 is affe…7.2
- CVE-2020-28885Liferay Portal Server tested on 7.3.5 GA6, 7.2.0 GA1 is affe…7.2
- CVE-2020-2889Vulnerability in the Oracle CRM Technical Foundation product…5.3
- CVE-2020-28895In Wind River VxWorks, memory allocator has a possible overf…7.3
- CVE-2020-28898In QED ResourceXpress through 4.9k, a large numeric or alpha…5.3
- CVE-2020-28899The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 dev…9.1
- CVE-2020-2890Vulnerability in the Oracle Applications Framework product o…8.2
- CVE-2020-28900Insufficient Verification of Data Authenticity in Nagios Fus…9.8
- CVE-2020-28901Command Injection in Nagios Fusion 4.1.8 and earlier allows …9.8
- CVE-2020-28902Command Injection in Nagios Fusion 4.1.8 and earlier allows …9.8
Are you affected by CVE-2020-28896?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST