The proc_do_xprt function in net/sunrpc/sysctl.c in the Linux kernel 220.127.116.11 does not check the length of a certain buffer obtained from userspace, which allows local users to overflow a stack-based buffer and have unspecified other impact via a crafted read system call for the /proc/sys/sunrpc/transports file.
CVSS Severity (version 2.0):
Impact Subscore: 10.0
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
Official Statement from Red Hat (09/05/2008)
Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, 5 or Red Hat Enterprise MRG.
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[linux-kernel] 20080830 buffer overflow in /proc/sys/sunrpc/transports
[linux-kernel] 20080830 Re: buffer overflow in /proc/sys/sunrpc/transports
[oss-security] 20080904 CVE request: kernel: sunrpc: fix possible overrun on read of /proc/sys/sunrpc/transports
Vulnerable software and versions