mirror of
https://github.com/ilyakooo0/nixpkgs.git
synced 2024-12-27 13:57:10 +03:00
101f62ad33
CVE-2012-4412, CVE-2012-4424, CVE-2013-4237, CVE-2013-4332, CVE-2013-4458, CVE-2013-4788.
51 lines
2.0 KiB
Diff
51 lines
2.0 KiB
Diff
commit 7cbcdb3699584db8913ca90f705d6337633ee10f
|
|
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
|
|
Date: Fri Oct 25 10:22:12 2013 +0530
|
|
|
|
Fix stack overflow due to large AF_INET6 requests
|
|
|
|
Resolves #16072 (CVE-2013-4458).
|
|
|
|
This patch fixes another stack overflow in getaddrinfo when it is
|
|
called with AF_INET6. The AF_UNSPEC case was fixed as CVE-2013-1914,
|
|
but the AF_INET6 case went undetected back then.
|
|
|
|
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
|
|
index e6ce4cf..8ff74b4 100644
|
|
--- a/sysdeps/posix/getaddrinfo.c
|
|
+++ b/sysdeps/posix/getaddrinfo.c
|
|
@@ -197,7 +197,22 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
|
|
&rc, &herrno, NULL, &localcanon)); \
|
|
if (rc != ERANGE || herrno != NETDB_INTERNAL) \
|
|
break; \
|
|
- tmpbuf = extend_alloca (tmpbuf, tmpbuflen, 2 * tmpbuflen); \
|
|
+ if (!malloc_tmpbuf && __libc_use_alloca (alloca_used + 2 * tmpbuflen)) \
|
|
+ tmpbuf = extend_alloca_account (tmpbuf, tmpbuflen, 2 * tmpbuflen, \
|
|
+ alloca_used); \
|
|
+ else \
|
|
+ { \
|
|
+ char *newp = realloc (malloc_tmpbuf ? tmpbuf : NULL, \
|
|
+ 2 * tmpbuflen); \
|
|
+ if (newp == NULL) \
|
|
+ { \
|
|
+ result = -EAI_MEMORY; \
|
|
+ goto free_and_return; \
|
|
+ } \
|
|
+ tmpbuf = newp; \
|
|
+ malloc_tmpbuf = true; \
|
|
+ tmpbuflen = 2 * tmpbuflen; \
|
|
+ } \
|
|
} \
|
|
if (status == NSS_STATUS_SUCCESS && rc == 0) \
|
|
h = &th; \
|
|
@@ -209,7 +224,8 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
|
|
{ \
|
|
__set_h_errno (herrno); \
|
|
_res.options |= old_res_options & RES_USE_INET6; \
|
|
- return -EAI_SYSTEM; \
|
|
+ result = -EAI_SYSTEM; \
|
|
+ goto free_and_return; \
|
|
} \
|
|
if (herrno == TRY_AGAIN) \
|
|
no_data = EAI_AGAIN; \
|