Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mutt | Mutt | < 2.0.2 |
| Neomutt | Neomutt | < 2020-11-20 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4bPatchThird Party Advisory
- https://github.com/neomutt/neomutt/releases/tag/20201120Release NotesThird Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59PatchThird Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/d92689088dfe80a290ec836e292376e2d9984f8PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00048.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202101-32Third Party Advisory
- https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4bPatchThird Party Advisory
- https://github.com/neomutt/neomutt/releases/tag/20201120Release NotesThird Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59PatchThird Party Advisory
- https://gitlab.com/muttmua/mutt/-/commit/d92689088dfe80a290ec836e292376e2d9984f8PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00048.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202101-32Third Party Advisory
FAQ
What is CVE-2020-28896?
CVE-2020-28896 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 th...
How severe is CVE-2020-28896?
CVE-2020-28896 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-28896?
Check the references section above for vendor advisories and patch information. Affected products include: Mutt Mutt, Neomutt Neomutt, Debian Debian Linux.