FreeBSD kernel NFS client local vulnerabilities
| CENSUS ID: | CENSUS-2010-0001 |
| CVE ID: | CVE-2010-2020 |
| Affected Products: | FreeBSD 8.0-RELEASE, 7.3-RELEASE, 7.2-RELEASE |
| Class: | Improper Input Validation (CWE-20) |
| Remote: | No |
| Discovered by: | Patroklos Argyroudis |
We have discovered two improper input validation vulnerabilities in the FreeBSD kernel’s NFS client-side implementation (FreeBSD 8.0-RELEASE, 7.3-RELEASE and 7.2-RELEASE) that allow local unprivileged users to escalate their privileges, or to crash the system by performing a denial of service attack.
FreeBSD kernel exploitation mitigations
In my recent Black Hat Europe 2010 talk I gave an overview of the kernel exploitation prevention mechanisms that exist on FreeBSD. A few people at the conference have subsequently asked me to elaborate on the subject. In this post I will collect all the information from my talk and the various discussions I had in the Black Hat conference hallways.
Update on canary randomisation for hardened Linux applications
This article is a followup to our last year’s advisory on canary randomisation for applications of the Debian distribution.
Monkey HTTPd improper input validation vulnerability
| CENSUS ID: | CENSUS-2009-0004 |
| Affected Products: | Monkey web server versions ≤ 0.9.2. |
| Class: | Improper Input Validation (CWE-20), Incorrect Calculation (CWE-682) |
| Remote: | Yes |
| Discovered by: | Patroklos Argyroudis |
We have discovered a remotely exploitable “improper input validation” vulnerability in the Monkey web server that allows an attacker to perform denial of service attacks by repeatedly crashing worker threads that process HTTP requests.