Full Disclosure mailing list archives
Re: DLL hijacking on Linux
From: Tim Brown <tmb () 65535 com>
Date: Wed, 25 Aug 2010 10:58:27 +0100
On Wednesday 25 August 2010 10:38:37 Mihai Donțu wrote:
man sudo(8): "Note that the dynamic linker on most operating systems will remove variables that can control dynamic linking from the environment of setuid executables, including sudo. Depending on the operating system this may include _RLD*, DYLD_*, LD_*, LDR_*, LIBPATH, SHLIB_PATH, and others. These type of variables are removed from the environment before sudo even begins execution and, as such, it is not possible for sudo to preserve them."
Absolutely, but in the case I gave, the path is set /by the script/, not inherited from the original user. The script sets the dangerous path, but since sudo hasn't changed the CWD it points at the directory the user running sudo was in. Tim -- Tim Brown <mailto:tmb () 65535 com>
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Current thread:
- DLL hijacking on Linux Tim Brown (Aug 25)
- Re: DLL hijacking on Linux Mihai Donțu (Aug 25)
- Re: DLL hijacking on Linux Tim Brown (Aug 25)
- Re: DLL hijacking on Linux Dan Rosenberg (Aug 25)
- Re: DLL hijacking on Linux Dan Rosenberg (Aug 25)
- Re: DLL hijacking on Linux bk (Aug 25)
- Re: DLL hijacking on Linux paul . szabo (Aug 25)
- Re: DLL hijacking on Linux Noah Slater (Aug 26)
- Re: DLL hijacking on Linux Paul Davis (Aug 26)
- Re: DLL hijacking on Linux Tim Brown (Aug 25)
- Re: DLL hijacking on Linux Noah Slater (Aug 26)
- Re: DLL hijacking on Linux Mihai Donțu (Aug 25)