Zero-day vulnerability in Adobe Flash Player

Cross-site scripting
CVE-2011-2107

The pay for an exploit might be around $5k-$10k at the moment.

Vulnerability details

Advisory: SB2011060501 - Cross-site scripting in Adobe Flash Player

Vulnerable component: Adobe Flash Player

CVE-ID: CVE-2011-2107

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

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Description:

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-input. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in userтАЩs browser in context of website hosting an .swf file.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Note: the vulnerability was being actively exploited.

External links:

http://www.adobe.com/support/security/bulletins/apsb11-13.html
https://googlechromereleases.blogspot.com/2011/06/stable-channel-update.html
http://support.blackberry.com/kb/articleDetail?ArticleNumber=000027240
https://devcentral.f5.com/articles/flash-player-universal-xss-vulnerability-cve-2011-2107
https://www.symantec.com/security_response/attacksignatures/detail.jsp?asid=24302
http://support.blackberry.com/kb/articleDetail?ArticleNumber=000027240
http://www.macworld.co.uk/news/mac-software/adobe-flash-patched-after-zero-day-attacks-3284214/
https://devcentral.f5.com/Portals/0/Cache/Pdfs/2807/flash-player-universal-xss-vulnerability--cve-20...
http://news.softpedia.com/news/Adobe-Fixes-Actively-Exploited-Flash-Player-XSS-Flaw-204376.shtml
http://www.infoworld.com/article/2621874/hacking/hackers-exploit-flash-bug-in-new-attacks-against-gm...
http://www.eweek.com/c/a/Security/Adobe-Patches-XSS-ZeroDay-Flaw-in-Flash-Used-in-Google-Gmail-Attac...
https://www.cnet.com/au/news/adobe-issues-fix-for-flash-hole-being-used-in-attacks/
http://www.computerdealernews.com/news/adobe-flash-patched-after-zero-day-attacks/7323

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.