The (1) sparc_mmap_check function in arch/sparc/kernel/sys_sparc.c and the (2) sparc64_mmap_check function in arch/sparc64/kernel/sys_sparc.c, in the Linux kernel 2.4 before 2.4.36.5 and 2.6 before 2.6.25.3, omit some virtual-address range (aka span) checks when the mmap MAP_FIXED bit is not set, which allows local users to cause a denial of service (panic) via unspecified mmap calls.

Dirk Nehring discovered that the IPsec protocol stack did not correctly handle fragmented ESP packets. A remote attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2007-6282)

Johannes Bauer discovered that the 64bit kernel did not correctly handle hrtimer updates. A local attacker could request a large expiration value and cause the system to hang, leading to a denial of service. (CVE-2007-6712)

Tavis Ormandy discovered that the ia32 emulation under 64bit kernels did not fully clear uninitialized data. A local attacker could read private kernel memory, leading to a loss of privacy. (CVE-2008-0598)

Jan Kratochvil discovered that PTRACE did not correctly handle certain calls when running under 64bit kernels. A local attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2008-1615)

Wei Wang discovered that the ASN.1 decoding routines in CIFS and SNMP NAT did not correctly handle certain length values. Remote attackers could exploit this to execute arbitrary code or crash the system.
(CVE-2008-1673)

Paul Marks discovered that the SIT interfaces did not correctly manage allocated memory. A remote attacker could exploit this to fill all available memory, leading to a denial of service. (CVE-2008-2136)

David Miller and Jan Lieskovsky discovered that the Sparc kernel did not correctly range-check memory regions allocated with mmap. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2008-2137)

The sys_utimensat system call did not correctly check file permissions in certain situations. A local attacker could exploit this to modify the file times of arbitrary files which could lead to a denial of service. (CVE-2008-2148)

Brandon Edwards discovered that the DCCP system in the kernel did not correctly check feature lengths. A remote attacker could exploit this to execute arbitrary code. (CVE-2008-2358)

A race condition was discovered between ptrace and utrace in the kernel. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2008-2365)

The copy_to_user routine in the kernel did not correctly clear memory destination addresses when running on 64bit kernels. A local attacker could exploit this to gain access to sensitive kernel memory, leading to a loss of privacy. (CVE-2008-2729)

The PPP over L2TP routines in the kernel did not correctly handle certain messages. A remote attacker could send a specially crafted packet that could crash the system or execute arbitrary code.
(CVE-2008-2750)

Gabriel Campana discovered that SCTP routines did not correctly check for large addresses. A local user could exploit this to allocate all available memory, leading to a denial of service. (CVE-2008-2826).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2007-6712     Johannes Bauer discovered an integer overflow condition     in the hrtimer subsystem on 64-bit systems. This can be     exploited by local users to trigger a denial of service     (DoS) by causing the kernel to execute an infinite loop.

  - CVE-2008-1615     Jan Kratochvil reported a local denial of service     condition that permits local users on systems running     the amd64 flavor kernel to cause a system crash.

  - CVE-2008-2136     Paul Harks discovered a memory leak in the Simple     Internet Transition (SIT) code used for IPv6 over IPv4     tunnels. This can be exploited by remote users to cause     a denial of service condition.

  - CVE-2008-2137     David Miller and Jan Lieskovsky discovered issues with     the virtual address range checking of mmaped regions on     the sparc architecture that may be exploited by local     users to cause a denial of service.

ID	Name	Product	Family	Severity
33531	Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : linux, linux-source-2.6.15/20/22 vulnerabilities (USN-625-1)	Nessus	Ubuntu Local Security Checks	critical
32448	Debian DSA-1588-1 : linux-2.6 - denial of service	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2008-2137

medium

Tenable Plugins

critical

high