Linux kernel tcp_sacktag_write_queue() denial of service
| linux-kernel-tcpsacktagwritequeue-dos (38548) |  Low Risk |
Description:
Linux kernel is vulnerable to a denial of service, caused by a NULL pointer dereference in the tcp_sacktag_write_queue() function. A remote attacker could send a specially-crafted ACK packet to cause the system to crash.
Platforms Affected:
- Canonical, Ubuntu 6.10
- Canonical, Ubuntu 7.04
- Canonical, Ubuntu 7.10
- Linux, Kernel 2.6.21 rc3
- Linux, Kernel 2.6.21 rc6
- Linux, Kernel 2.6.21 rc5
- Linux, Kernel 2.6.21 rc4
- Linux, Kernel 2.6.21
- Linux, Kernel 2.6.21.1
- Linux, Kernel 2.6.21.2
- Linux, Kernel 2.6.21.6
- Linux, Kernel 2.6.21.7
- Linux, Kernel 2.6.22
- Linux, Kernel 2.6.22 rc7
- Linux, Kernel 2.6.22.11
- Linux, Kernel 2.6.22.3
- Linux, Kernel 2.6.22.4
- Linux, Kernel 2.6.22.5
- Linux, Kernel 2.6.22.6
- Linux, Kernel 2.6.22.8
- Linux, Kernel 2.6.23
- Linux, Kernel 2.6.23 rc2
- Linux, Kernel 2.6.23 rc1
- Linux, Kernel 2.6.23.1
- Linux, Kernel 2.6.23.2
- Linux, Kernel 2.6.23.3
- Linux, Kernel 2.6.23.4
- Linux, Kernel 2.6.23.5
- Linux, Kernel 2.6.23.6
- Linux, Kernel 2.6.23.7
- Linux, Kernel 2.6.24 rc1
- Linux, Kernel 2.6.24 rc2
- MandrakeSoft, Mandrake Linux 2008.0
- MandrakeSoft, Mandrake Linux 2008.0 X86_64
- Novell, OpenSUSE 10.3
- SuSE, SuSE Linux Enterprise Realtime 10 SP1
Remedy:
Upgrade to the latest version of Linux kernel (2.6.23.8 or later), available from The Linux Kernel Archives Web site. See References.
For other distributions:
Apply the appropriate update for your system. See References.
Consequences:
Denial of Service
References:
- The Linux Kernel Archives Web site, The Linux Kernel Archives at http://kernel.org/.
- The Linux Kernel Archives Web site, ChangeLog-2.6.23.8 at http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.8.
- BID-26474: Linux Kernel TCP_Input.C Remote Denial of Service Vulnerability
- CVE-2007-5501: The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.21 through 2.6.23.7, and 2.6.24-rc through 2.6.24-rc2, allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.
- MDKSA-2007:226: Updated kernel packages fix multiple vulnerabilities and bugs
- MDVSA-2008:044: Updated kernel packages fix multiple vulnerabilities and bugs
- SA27664: Linux Kernel Multiple Denial of Service Vulnerabilities
- SUSE-SA:2007:063: Linux kernel security problems
- SUSE-SA:2008:013: Linux kernel security problem
- USN-558-1: Linux kernel vulnerabilities
- USN-574-1: Linux kernel vulnerabilities
- VUPEN/ADV-2007-3902: Linux Kernel wait_task_stopped() and tcp_write_queue_head() Issues
Reported:
Nov 16, 2007
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