Title: Solaris whodo Buffer Overflow Vulnerability
Severity: HIGH
Description:
The 'whodo' utility shipped with Sun Microsystems' Solaris provides a listing of users online and their activities. It is installed setuid root because it reads from the 'utmp' log as well as from the process table.
'whodo' contains a buffer overflow which can be exploited to gain root privileges. The overflow condition occurs on the stack when the value of the 'CFTIME' environment variable is excessive in length. This is likely due to an unbounded string copy.
A local user can execute 'whodo' with a 'CFTIME' environment variable that will cause a function return address to be overwritten with a pointer to supplied shellcode. This shellcode, which will be executed when the affected function returns, can provide the attacker with the enhanced privileges of the process (root).
Any attacker to successfully exploit this vulnerability will gain root privileges and have complete control over the host.
Affected Products:
- Sun Solaris 2.5
- Sun Solaris 2.5.1
- Sun Solaris 2.5.1_x86
- Sun Solaris 2.5_x86
- Sun Solaris 2.6
- Sun Solaris 2.6_x86
- Sun Solaris 7.0
- Sun Solaris 7.0_x86
- Sun Solaris 8
- Sun Solaris 8_x86
References:
- Sun Microsystems: Sunsolve Online(tm)
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