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Comodo GeekBuddy Local Privilege Escalation

Comodo GeekBuddy Local Privilege Escalation
Posted May 20, 2015
Authored by Jeremy Brown

Comodo GeekBuddy, which is bundled with Comodo Anti-Virus, Comodo Firewall, and Comodo Internet Security, runs a passwordless, background VNC server and listens for incoming connections. This can allow for at least local privilege escalation on several platforms. It also may be remotely exploitable via CSRF-like attacks utilizing a modified web-based VNC client (eg. a Java VNC client).

tags | exploit, java, web, local, virus
MD5 | 9fc05c99e3ced7baa78fc5b8a35e8e13

Comodo GeekBuddy Local Privilege Escalation

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Comodo GeekBuddy Local Privilege Escalation (CVE-2014-7872)

Jeremy Brown [jbrown3264/gmail]

-Synopsis-

Comodo GeekBuddy, which is bundled with Comodo Anti-Virus, Comodo Firewall
and Comodo Internet Security, runs a passwordless, background VNC server
and listens for incoming connections. This can allow for at least local
privilege escalation on several platforms. It also may be remotely
exploitable via CSRF-like attacks utilizing a modified web-based VNC client
(eg. a Java VNC client).

-Repro-

1) Install GeekBuddy (either standalone or bundled with the aforementioned
packages)
2) Administrator (or other user) logs into the system so the VNC server
will be started
3) Start another login to the system (eg. target OS is Windows Server)
4) Connect to the VNC server on localhost to assume the Admin session

-Fix-

Comodo says they have fix this vulnerability with the v4.18.121 release in
October 2014

-References-

https://technet.microsoft.com/en-US/dn613815
http://archive.hack.lu/2014/Microsoft%20Vulnerability%20Research%20-%20How%20to%20be%20a%20Finder%20as%20a%20Vendor.pdf
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