Bug 78291 - exec of setuid root program loses some environment variables
Summary: exec of setuid root program loses some environment variables
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: glibc
Version: 7.3
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Jakub Jelinek
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2002-11-20 20:24 UTC by Need Real Name
Modified: 2016-11-24 14:55 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2002-11-20 20:25:40 UTC

Attachments (Terms of Use)
description and test case to demonstrate bug (40.00 KB, application/octet-stream)
2002-11-20 20:25 UTC, Need Real Name
no flags Details

Description Need Real Name 2002-11-20 20:24:32 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)

Description of problem:
Certain environment variables
are removed from the environment of an exec'ed program, when that 
program is owned by root with the setuid bit set.

One such variable is LD_LIBRARY_PATH.  But this
is OK:  it is known that setuid programs delete LD_LIBRARY_PATH
from the environment list.  
(See /usr/src/redhat/SOURCES/glibc-2.2.5/sysdeps/generic/unsecvars.h)

The bug is that the environment variables G, H, L, M, N, R, and T
are also deleted from the environment.  Suspiciously, these happen
to be exactly the set of initial letters of the variables listed in 

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
See attachment for detailed information.

Additional info:

Comment 1 Need Real Name 2002-11-20 20:25:32 UTC
Created attachment 85753 [details]
description and test case to demonstrate bug

Comment 2 Jakub Jelinek 2002-11-20 20:55:37 UTC
This is fixed by glibc 7.3 errata.

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