#VU41208 Heap-based buffer overflow in TigerVNC - CVE-2014-8240

Vulnerability identifier: #VU41208

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-8240

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TigerVNC
Web applications / Modules and components for CMS

Vendor: tigervnc.org

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Integer overflow in TigerVNC. A remote attacker can use vectors related to screen size handling to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

TigerVNC: 0.0.90 - 1.1.0

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External links
https://seclists.org/oss-sec/2014/q4/278
https://seclists.org/oss-sec/2014/q4/300
https://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://www.securityfocus.com/bid/70391
https://bugzilla.redhat.com/show_bug.cgi?id=1151307
https://exchange.xforce.ibmcloud.com/vulnerabilities/96947
https://security.gentoo.org/glsa/201612-36

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.