blob: b6658d7c7f6fbfe526c8aa51bd7e6a09f8ab926a (
plain) (
blame)
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
|
Fix CVE-2020-15900.
https://cve.circl.lu/cve/CVE-2020-15900
https://artifex.com/security-advisories/CVE-2020-15900
Taken from upstream:
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=5d499272b95a6b890a1397e11d20937de000d31b
diff --git a/psi/zstring.c b/psi/zstring.c
--- a/psi/zstring.c
+++ b/psi/zstring.c
@@ -142,13 +142,18 @@ search_impl(i_ctx_t *i_ctx_p, bool forward)
return 0;
found:
op->tas.type_attrs = op1->tas.type_attrs;
- op->value.bytes = ptr;
- r_set_size(op, size);
+ op->value.bytes = ptr; /* match */
+ op->tas.rsize = size; /* match */
push(2);
- op[-1] = *op1;
- r_set_size(op - 1, ptr - op[-1].value.bytes);
- op1->value.bytes = ptr + size;
- r_set_size(op1, count + (!forward ? (size - 1) : 0));
+ op[-1] = *op1; /* pre */
+ op[-3].value.bytes = ptr + size; /* post */
+ if (forward) {
+ op[-1].tas.rsize = ptr - op[-1].value.bytes; /* pre */
+ op[-3].tas.rsize = count; /* post */
+ } else {
+ op[-1].tas.rsize = count; /* pre */
+ op[-3].tas.rsize -= count + size; /* post */
+ }
make_true(op);
return 0;
}
|
