From f6110a8fee2ca36f8e2d2abecf3cba9fa7b8ea7d Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Mon, 19 Jun 2017 17:09:55 +0200
Subject: [PATCH] CVE-2017-1000366: Ignore LD_LIBRARY_PATH for AT_SECURE=1
 programs [BZ #21624]

LD_LIBRARY_PATH can only be used to reorder system search paths, which
is not useful functionality.

This makes an exploitable unbounded alloca in _dl_init_paths unreachable
for AT_SECURE=1 programs.

patch from:
https://sourceware.org/git/?p=glibc.git;a=commit;h=f6110a8fee2ca36f8e2d2abecf3cba9fa7b8ea7d
---
 ChangeLog  | 7 +++++++
 elf/rtld.c | 3 ++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/elf/rtld.c b/elf/rtld.c
index 2446a87..2269dbe 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -2422,7 +2422,8 @@ process_envvars (enum mode *modep)
 
 	case 12:
 	  /* The library search path.  */
-	  if (memcmp (envline, "LIBRARY_PATH", 12) == 0)
+	  if (!__libc_enable_secure
+	      && memcmp (envline, "LIBRARY_PATH", 12) == 0)
 	    {
 	      library_path = &envline[13];
 	      break;
-- 
2.9.3

mmary</a><a href='/guix/refs/?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>refs</a><a class='active' href='/guix/log/gnu/packages/nfs.scm'>log</a><a href='/guix/tree/gnu/packages/nfs.scm?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>tree</a><a href='/guix/commit/gnu/packages/nfs.scm?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>commit</a><a href='/guix/diff/gnu/packages/nfs.scm?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/nfs.scm'>
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<div class='path'>path: <a href='/guix/log/?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>root</a>/<a href='/guix/log/gnu?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>gnu</a>/<a href='/guix/log/gnu/packages?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>packages</a>/<a href='/guix/log/gnu/packages/nfs.scm?id=e7859da11371e9bd0fffc5235b9e980cccf4b239'>nfs.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/nfs.scm?id=e7859da11371e9bd0fffc5235b9e980cccf4b239&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-04-04 22:05:01 -0400'>2020-04-04</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=084d15656342f6c69a1448c2d41f27e8499bd61d'>gnu: nfs-utils: Fix the shebangs of the Python based tools.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-02-18 18:25:29 +0100'>2020-02-18</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=a76e49addf77ba1135bfea82d59ad6beff3a7e31'>gnu: nfs-utils: Use HTTPS home page.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-01-10 22:45:09 +0100'>2020-01-10</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=53904f7422a19f9b5bd2adad6af2cdb688d79893'>gnu: nfs-utils: Build rpc.svcgssd.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2020-01-04 22:38:12 +0100'>2020-01-04</span></td><td><a href='/guix/commit/gnu/packages/nfs.scm?id=b224ff4a2d962d0206262cd18cdae8c169e41a0c'>gnu: nfs-utils: Update to 2.4.2.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>