Description
The JavaScript implementation in WebKit in Apple Safari before 5.0.3 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1.3 on Mac OS X 10.4, uses a weak algorithm for generating values of random numbers, which makes it easier for remote attackers to track a user by predicting a value, a related issue to CVE-2008-5913 and CVE-2010-3171.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | qtwebkit-source | No fix yet | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 2
- WebKit - Insufficient Entropy Random Number Generator (1) EDB-35005 · remote · Nov 18, 2010 · verified
- WebKit - Insufficient Entropy Random Number Generator (2) EDB-35006 · remote · Nov 18, 2010 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 43068 third-party-advisory
- http://support.apple.com/kb/HT4455
- ADV-2011-0212 vdb-entry
- ADV-2010-3046 vdb-entry
- safari-javascript-weak-security(63347) vdb-entry
- SUSE-SR:2011:002 vendor-advisory
- APPLE-SA-2010-11-18-1 vendor-advisory
- 42314 third-party-advisory
- oval:org.mitre.oval:def:11495 vdb-entry signature
- http://support.apple.com/kb/HT4456
- APPLE-SA-2010-11-22-1 vendor-advisory