Zero-day vulnerability in Microsoft Silverlight

Memory corruption
CVE-2013-0074

Known malware:

Exploit kits: Angler, Archie, Astrum, Fiesta, Hanjuan, Infinity (Exploit kit), Neutrino, Nuclear Pack, RIG.

Vulnerability details

Advisory: SB2013031201 - Remote code execution in Microsoft Silverlight

Vulnerable component: Microsoft Silverlight

CVE-ID: CVE-2013-0074

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-119 - Memory corruption

Description:

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

The weakness exists due to boundary error when rendering an HTML object. A remote attacker can create a specially crafted Web site containing a malicious Silverlight applicationt, trick the victim into visiting it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Public Exploits:

- Microsoft Silverlight - ScriptObject Unsafe Memory Access (MS13-022/MS13-087) (Metasploit) [Exploit-DB]

- Microsoft Internet Explorer - COALineDashStyleArray Unsafe Memory Access (MS12-022) (Metasploit) [Exploit-DB]

External links:

https://technet.microsoft.com/en-us/library/security/ms13-022.aspx
https://www.zscaler.com/blogs/research/exploit-kits-anatomy-silverlight-exploit
https://www.checkpoint.com/downloads/partners/TCC-Silverlight-Jan2015.pdf
https://www.symantec.com/security_response/vulnerability.jsp?bid=58327
http://journeyintoir.blogspot.com/2014/05/cve-2013-0074-3896-silverlight-exploit.html
https://www.symantec.com/security_response/attacksignatures/detail.jsp?asid=27612
http://www.vxsecurity.sg/2014/06/18/technical-tear-down-fiesta-exploit-kit-silverlight-exploit-cve-2...
http://blog.trendmicro.com/trendlabs-security-intelligence/a-look-at-a-silverlight-exploit/
https://blog.malwarebytes.com/threat-analysis/2014/05/malvertising-campaign-on-popular-site-leads-to...
http://blogs.cisco.com/security/angling-for-silverlight-exploits
https://www.scmagazine.com/more-exploits-including-silverlight-attack-packed-in-nuclear-kit/article/...
http://arstechnica.com/security/2014/05/move-over-java-drive-by-attacks-exploiting-microsoft-silverl...

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.