The terminal dispatcher in mosh before 1.2.1 allows remote authenticated users to cause a denial of service (long loop and CPU consumption) via an escape sequence with a large repeat count value.

Updated mosh package fixes security vulnerability :

Mosh versions 1.2 and earlier allow an application to cause the mosh-server to consume large amounts of CPU time with a short ANSI escape sequence. In addition, a malicious mosh-server can cause the mosh-client to consume large amounts of CPU time with a short ANSI escape sequence. This arises because there was no limit on the value of the repeat parameter in some ANSI escape sequences, so even large and nonsensical values would be interpreted by Mosh's terminal emulator (CVE-2012-2385).

Update to mosh 1.2.2

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
66116	Mandriva Linux Security Advisory : mosh (MDVSA-2013:104)	Nessus	Mandriva Local Security Checks	medium
59697	Fedora 17 : mosh-1.2.2-1.fc17 (2012-9442)	Nessus	Fedora Local Security Checks	medium
59695	Fedora 15 : mosh-1.2.2-1.fc15 (2012-9422)	Nessus	Fedora Local Security Checks	medium
59694	Fedora 16 : mosh-1.2.2-1.fc16 (2012-9414)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2012-2385

medium

Tenable Plugins

medium

medium

medium

medium