Heap-based buffer overflow in TigerVNC

1) Heap-based buffer overflow

EUVDB-ID: #VU41208

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 - Heap-based Buffer Overflow

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:tigervnc.org:tigervnc:0.0.90:*:*:*:*:*:*:*
• cpe:2.3:a:tigervnc.org:tigervnc:0.0.91:*:*:*:*:*:*:*
• cpe:2.3:a:tigervnc.org:tigervnc:1.0.0:*:*:*:*:*:*:*

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

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.