forked from mirrors/nixpkgs
Adding a fix for an important glibc vulnerability, very easy to exploit:
http://www.securityfocus.com/bid/44347 svn path=/nixpkgs/branches/stdenv-updates/; revision=24475
This commit is contained in:
Lluís Batlle i Rossell
parent
6dc839d344
commit
f3da1c5e80
224
pkgs/development/libraries/glibc-2.12/audit_suid.patch
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224
pkgs/development/libraries/glibc-2.12/audit_suid.patch
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@ -0,0 +1,224 @@
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Fix for glibc vulnerability.
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http://www.securityfocus.com/bid/44347
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From:
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http://repo.or.cz/w/glibc.git/patch/8e9f92e9d5d7737afdacf79b76d98c4c42980508
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From 8e9f92e9d5d7737afdacf79b76d98c4c42980508 Mon Sep 17 00:00:00 2001
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From: Andreas Schwab <schwab@redhat.com>
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Date: Sun, 24 Oct 2010 21:43:15 -0400
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Subject: [PATCH] Require suid bit on audit objects in privileged programs
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---
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ChangeLog | 15 +++++++++++++++
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elf/dl-deps.c | 2 +-
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elf/dl-load.c | 20 +++++++++++---------
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elf/dl-open.c | 2 +-
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elf/rtld.c | 16 +++++++---------
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include/dlfcn.h | 1 +
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sysdeps/generic/ldsodefs.h | 6 ++----
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7 files changed, 38 insertions(+), 24 deletions(-)
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diff --git a/elf/dl-deps.c b/elf/dl-deps.c
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index a58de5c..a51fb6e 100644
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--- a/elf/dl-deps.c
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+++ b/elf/dl-deps.c
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@@ -62,7 +62,7 @@ openaux (void *a)
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{
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struct openaux_args *args = (struct openaux_args *) a;
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- args->aux = _dl_map_object (args->map, args->name, 0,
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+ args->aux = _dl_map_object (args->map, args->name,
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(args->map->l_type == lt_executable
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? lt_library : args->map->l_type),
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args->trace_mode, args->open_mode,
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diff --git a/elf/dl-load.c b/elf/dl-load.c
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index a7162eb..aa8738f 100644
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--- a/elf/dl-load.c
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+++ b/elf/dl-load.c
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@@ -1812,7 +1812,7 @@ open_verify (const char *name, struct filebuf *fbp, struct link_map *loader,
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if MAY_FREE_DIRS is true. */
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static int
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-open_path (const char *name, size_t namelen, int preloaded,
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+open_path (const char *name, size_t namelen, int secure,
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struct r_search_path_struct *sps, char **realname,
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struct filebuf *fbp, struct link_map *loader, int whatcode,
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bool *found_other_class)
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@@ -1894,7 +1894,7 @@ open_path (const char *name, size_t namelen, int preloaded,
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/* Remember whether we found any existing directory. */
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here_any |= this_dir->status[cnt] != nonexisting;
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- if (fd != -1 && __builtin_expect (preloaded, 0)
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+ if (fd != -1 && __builtin_expect (secure, 0)
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&& INTUSE(__libc_enable_secure))
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{
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/* This is an extra security effort to make sure nobody can
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@@ -1963,7 +1963,7 @@ open_path (const char *name, size_t namelen, int preloaded,
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struct link_map *
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internal_function
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-_dl_map_object (struct link_map *loader, const char *name, int preloaded,
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+_dl_map_object (struct link_map *loader, const char *name,
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int type, int trace_mode, int mode, Lmid_t nsid)
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{
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int fd;
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@@ -2067,7 +2067,8 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
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for (l = loader; l; l = l->l_loader)
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if (cache_rpath (l, &l->l_rpath_dirs, DT_RPATH, "RPATH"))
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{
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- fd = open_path (name, namelen, preloaded, &l->l_rpath_dirs,
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+ fd = open_path (name, namelen, mode & __RTLD_SECURE,
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+ &l->l_rpath_dirs,
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&realname, &fb, loader, LA_SER_RUNPATH,
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&found_other_class);
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if (fd != -1)
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@@ -2082,14 +2083,15 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
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&& main_map != NULL && main_map->l_type != lt_loaded
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&& cache_rpath (main_map, &main_map->l_rpath_dirs, DT_RPATH,
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"RPATH"))
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- fd = open_path (name, namelen, preloaded, &main_map->l_rpath_dirs,
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+ fd = open_path (name, namelen, mode & __RTLD_SECURE,
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+ &main_map->l_rpath_dirs,
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&realname, &fb, loader ?: main_map, LA_SER_RUNPATH,
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&found_other_class);
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}
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/* Try the LD_LIBRARY_PATH environment variable. */
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if (fd == -1 && env_path_list.dirs != (void *) -1)
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- fd = open_path (name, namelen, preloaded, &env_path_list,
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+ fd = open_path (name, namelen, mode & __RTLD_SECURE, &env_path_list,
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&realname, &fb,
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loader ?: GL(dl_ns)[LM_ID_BASE]._ns_loaded,
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LA_SER_LIBPATH, &found_other_class);
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@@ -2098,12 +2100,12 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
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if (fd == -1 && loader != NULL
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&& cache_rpath (loader, &loader->l_runpath_dirs,
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DT_RUNPATH, "RUNPATH"))
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- fd = open_path (name, namelen, preloaded,
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+ fd = open_path (name, namelen, mode & __RTLD_SECURE,
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&loader->l_runpath_dirs, &realname, &fb, loader,
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LA_SER_RUNPATH, &found_other_class);
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if (fd == -1
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- && (__builtin_expect (! preloaded, 1)
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+ && (__builtin_expect (! (mode & __RTLD_SECURE), 1)
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|| ! INTUSE(__libc_enable_secure)))
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{
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/* Check the list of libraries in the file /etc/ld.so.cache,
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@@ -2169,7 +2171,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded,
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&& ((l = loader ?: GL(dl_ns)[nsid]._ns_loaded) == NULL
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|| __builtin_expect (!(l->l_flags_1 & DF_1_NODEFLIB), 1))
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&& rtld_search_dirs.dirs != (void *) -1)
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- fd = open_path (name, namelen, preloaded, &rtld_search_dirs,
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+ fd = open_path (name, namelen, mode & __RTLD_SECURE, &rtld_search_dirs,
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&realname, &fb, l, LA_SER_DEFAULT, &found_other_class);
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/* Add another newline when we are tracing the library loading. */
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diff --git a/elf/dl-open.c b/elf/dl-open.c
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index c394b3f..cf8e8cc 100644
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--- a/elf/dl-open.c
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+++ b/elf/dl-open.c
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@@ -223,7 +223,7 @@ dl_open_worker (void *a)
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/* Load the named object. */
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struct link_map *new;
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- args->map = new = _dl_map_object (call_map, file, 0, lt_loaded, 0,
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+ args->map = new = _dl_map_object (call_map, file, lt_loaded, 0,
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mode | __RTLD_CALLMAP, args->nsid);
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/* If the pointer returned is NULL this means the RTLD_NOLOAD flag is
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diff --git a/elf/rtld.c b/elf/rtld.c
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index 5ecc4fe..06b534a 100644
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--- a/elf/rtld.c
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+++ b/elf/rtld.c
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@@ -589,7 +589,6 @@ struct map_args
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/* Argument to map_doit. */
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char *str;
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struct link_map *loader;
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- int is_preloaded;
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int mode;
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/* Return value of map_doit. */
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struct link_map *map;
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@@ -627,16 +626,17 @@ static void
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map_doit (void *a)
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{
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struct map_args *args = (struct map_args *) a;
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- args->map = _dl_map_object (args->loader, args->str,
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- args->is_preloaded, lt_library, 0, args->mode,
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- LM_ID_BASE);
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+ args->map = _dl_map_object (args->loader, args->str, lt_library, 0,
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+ args->mode, LM_ID_BASE);
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}
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static void
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dlmopen_doit (void *a)
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{
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struct dlmopen_args *args = (struct dlmopen_args *) a;
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- args->map = _dl_open (args->fname, RTLD_LAZY | __RTLD_DLOPEN | __RTLD_AUDIT,
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+ args->map = _dl_open (args->fname,
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+ (RTLD_LAZY | __RTLD_DLOPEN | __RTLD_AUDIT
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+ | __RTLD_SECURE),
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dl_main, LM_ID_NEWLM, _dl_argc, INTUSE(_dl_argv),
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__environ);
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}
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@@ -806,8 +806,7 @@ do_preload (char *fname, struct link_map *main_map, const char *where)
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args.str = fname;
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args.loader = main_map;
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- args.is_preloaded = 1;
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- args.mode = 0;
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+ args.mode = __RTLD_SECURE;
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unsigned int old_nloaded = GL(dl_ns)[LM_ID_BASE]._ns_nloaded;
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@@ -1054,7 +1053,6 @@ of this helper program; chances are you did not intend to run this program.\n\
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args.str = rtld_progname;
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args.loader = NULL;
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- args.is_preloaded = 0;
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args.mode = __RTLD_OPENEXEC;
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(void) _dl_catch_error (&objname, &err_str, &malloced, map_doit,
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&args);
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@@ -1066,7 +1064,7 @@ of this helper program; chances are you did not intend to run this program.\n\
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else
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{
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HP_TIMING_NOW (start);
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- _dl_map_object (NULL, rtld_progname, 0, lt_library, 0,
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+ _dl_map_object (NULL, rtld_progname, lt_library, 0,
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__RTLD_OPENEXEC, LM_ID_BASE);
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HP_TIMING_NOW (stop);
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diff --git a/include/dlfcn.h b/include/dlfcn.h
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index a67426d..af92483 100644
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--- a/include/dlfcn.h
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+++ b/include/dlfcn.h
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@@ -9,6 +9,7 @@
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#define __RTLD_OPENEXEC 0x20000000
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#define __RTLD_CALLMAP 0x10000000
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#define __RTLD_AUDIT 0x08000000
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+#define __RTLD_SECURE 0x04000000 /* Apply additional security checks. */
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#define __LM_ID_CALLER -2
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diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
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index fcc943b..fa4b6b2 100644
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--- a/sysdeps/generic/ldsodefs.h
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+++ b/sysdeps/generic/ldsodefs.h
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@@ -824,11 +824,9 @@ extern void _dl_receive_error (receiver_fct fct, void (*operate) (void *),
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/* Open the shared object NAME and map in its segments.
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LOADER's DT_RPATH is used in searching for NAME.
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- If the object is already opened, returns its existing map.
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- For preloaded shared objects PRELOADED is set to a non-zero
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- value to allow additional security checks. */
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+ If the object is already opened, returns its existing map. */
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extern struct link_map *_dl_map_object (struct link_map *loader,
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- const char *name, int preloaded,
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+ const char *name,
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int type, int trace_mode, int mode,
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Lmid_t nsid)
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internal_function attribute_hidden;
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--
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1.6.5.GIT
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@ -89,6 +89,9 @@ stdenv.mkDerivation ({
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/* Workaround for a glibc bug reported upstraem already */
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./disable-strstr-sse42.patch
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/* Fix for a vulnerability */
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./audit_suid.patch
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];
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postPatch = ''
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