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CVE-2018-14354: Mutt: Command injection
CVE-2018-14354 is rated critical with a CVSS v3.1 base score of 9.8 and affects Mutt, along with 8 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.
Vulnerability description
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They allow remote IMAP servers to execute arbitrary commands via backquote characters, related to the mailboxes command associated with a manual subscription or unsubscription.
Severity breakdown
CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Scope: Unchanged. Impact stays within the vulnerable component.
- Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: High. Total loss of availability; the component can be shut down.
Underlying weakness
CWE-78: Improper Neutralization of Special Elements used in an OS Command
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.
Affected products
- Mutt: before 1.10.1
- Neomutt: before 20180716
- Canonical Ubuntu Linux: 12.04; 14.04; 16.04; 18.04
- Debian Linux: 8.0; 9.0
- Red Hat Enterprise Linux Desktop: 6.0; 7.0
- Red Hat Enterprise Linux Server: 6.0; 7.0
- Red Hat Enterprise Linux Server Aus: 7.6; 7.7
- Red Hat Enterprise Linux Server Eus: 7.5; 7.6; 7.7
- Red Hat Enterprise Linux Server Tus: 7.6; 7.7
- Red Hat Enterprise Linux Workstation: 6.0; 7.0
References
- https://github.com/neomutt/neomutt/commit/95e80bf9ff10f68cb6443f760b85df4117cb15eb
- https://gitlab.com/muttmua/mutt/commit/185152818541f5cdc059cbff3f3e8b654fc27c1d
- http://www.mutt.org/news.html
- https://neomutt.org/2018/07/16/release
- http://www.securityfocus.com/bid/104925
- https://access.redhat.com/errata/RHSA-2018:2526
- https://lists.debian.org/debian-lts-announce/2018/08/msg00001.html
- https://security.gentoo.org/glsa/201810-07
- https://usn.ubuntu.com/3719-1/
- https://usn.ubuntu.com/3719-2/
- https://usn.ubuntu.com/3719-3/
- https://www.debian.org/security/2018/dsa-4277