>> Linux Kernel Denial of Service and Security Bypass Vulnerabilities
Title : Linux Kernel Denial of Service and Security Bypass Vulnerabilities VUPEN ID : VUPEN/ADV-2008-1543 CVE ID : CVE-2008-2136 - CVE-2008-2137 - CVE-2008-2148
Rated as : Moderate Risk
Remotely Exploitable : Yes Locally Exploitable : Yes Release Date : 2008-05-15
Technical Description
Multiple vulnerabilities have been identified in Linux Kernel, which could be exploited by remote attackers or malicious users to cause a denial of service.
The first issue is caused by an error in the "utimensat()" system call that does not check file permissions when certain "UTIME_NOW" and "UTIME_OMIT" combinations are used, which could allow local attackers to modify file times of arbitrary files, possibly creating a denial of service condition.
The second vulnerability is caused by an error in the "ipip6_rcv()" [net/ipv6/sit.c] function when processing malformed packets, which could be exploited by remote attackers to cause a denial of service.
The third issue is caused by an error within the virtual address range checking of mmaped regions on the sparc architecture, which could allow local attackers to cause a denial of service.
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