/
cve-2010-3847.patch
82 lines (71 loc) · 2.8 KB
/
cve-2010-3847.patch
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
2010-10-18 Andreas Schwab <schwab@redhat.com>
* elf/dl-load.c (is_dst): Remove last parameter.
(_dl_dst_count): Ignore $ORIGIN in privileged programs.
(_dl_dst_substitute): Likewise.
---
elf/dl-load.c | 30 +++++++++++++-----------------
1 files changed, 13 insertions(+), 17 deletions(-)
diff --git a/elf/dl-load.c b/elf/dl-load.c
index a7162eb..776f7e4 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -169,8 +169,7 @@ local_strdup (const char *s)
static size_t
-is_dst (const char *start, const char *name, const char *str,
- int is_path, int secure)
+is_dst (const char *start, const char *name, const char *str, int is_path)
{
size_t len;
bool is_curly = false;
@@ -199,11 +198,6 @@ is_dst (const char *start, const char *name, const char *str,
&& (!is_path || name[len] != ':'))
return 0;
- if (__builtin_expect (secure, 0)
- && ((name[len] != '\0' && (!is_path || name[len] != ':'))
- || (name != start + 1 && (!is_path || name[-2] != ':'))))
- return 0;
-
return len;
}
@@ -218,13 +212,12 @@ _dl_dst_count (const char *name, int is_path)
{
size_t len;
- /* $ORIGIN is not expanded for SUID/GUID programs (except if it
- is $ORIGIN alone) and it must always appear first in path. */
+ /* $ORIGIN is not expanded for SUID/GUID programs. */
++name;
- if ((len = is_dst (start, name, "ORIGIN", is_path,
- INTUSE(__libc_enable_secure))) != 0
- || (len = is_dst (start, name, "PLATFORM", is_path, 0)) != 0
- || (len = is_dst (start, name, "LIB", is_path, 0)) != 0)
+ if (((len = is_dst (start, name, "ORIGIN", is_path)) != 0
+ && !INTUSE(__libc_enable_secure))
+ || (len = is_dst (start, name, "PLATFORM", is_path)) != 0
+ || (len = is_dst (start, name, "LIB", is_path)) != 0)
++cnt;
name = strchr (name + len, '$');
@@ -256,9 +249,12 @@ _dl_dst_substitute (struct link_map *l, const char *name, char *result,
size_t len;
++name;
- if ((len = is_dst (start, name, "ORIGIN", is_path,
- INTUSE(__libc_enable_secure))) != 0)
+ if ((len = is_dst (start, name, "ORIGIN", is_path)) != 0)
{
+ /* Ignore this path element in SUID/SGID programs. */
+ if (INTUSE(__libc_enable_secure))
+ repl = (const char *) -1;
+ else
#ifndef SHARED
if (l == NULL)
repl = _dl_get_origin ();
@@ -266,9 +262,9 @@ _dl_dst_substitute (struct link_map *l, const char *name, char *result,
#endif
repl = l->l_origin;
}
- else if ((len = is_dst (start, name, "PLATFORM", is_path, 0)) != 0)
+ else if ((len = is_dst (start, name, "PLATFORM", is_path)) != 0)
repl = GLRO(dl_platform);
- else if ((len = is_dst (start, name, "LIB", is_path, 0)) != 0)
+ else if ((len = is_dst (start, name, "LIB", is_path)) != 0)
repl = DL_DST_LIB;
if (repl != NULL && repl != (const char *) -1)