CVE-2007-3731
Publication date 17 September 2007
Last updated 24 July 2024
Ubuntu priority
The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.
From the Ubuntu Security Team
Evan Teran discovered that the Linux kernel ptrace routines did not correctly handle certain requests robustly. Local attackers could exploit this to crash the system, causing a denial of service
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| linux-source-2.6.15 | ||
| linux-source-2.6.17 | ||
| linux-source-2.6.20 |