Privilege escalation in IBM Trusteer Rapport

1) Stack-based buffer overflow

EUVDB-ID: #VU16702

Risk: Low

CVSSv3.1: 8.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to a signedness bug in validating the user-supplied number of elements provided by the user in the structure passed to the Kernel driver function. A local attacker can perform a call to an struct method exported from the Kernel driver with the IOService 'com_trusteer_rapportke_v2', trigger stack-based buffer overflow and execute arbitrary code in the context of the service daemon.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address the vulnerability.

Vulnerable software versions

Trusteer Rapport: All versions

External links

http://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/kernel-buffer-overflow-in-trusteer-r...
http://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=21465

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.