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GNU C Library master sources branch bug19879 created. glibc-2.23-132-g317b199
- From: fw at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 29 Mar 2016 14:05:41 -0000
- Subject: GNU C Library master sources branch bug19879 created. glibc-2.23-132-g317b199
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The branch, bug19879 has been created
at 317b199b4aff8cfa27f2302ab404d2bb5032b9a4 (commit)
- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=317b199b4aff8cfa27f2302ab404d2bb5032b9a4
commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4
Author: Florian Weimer <fweimer@redhat.com>
Date: Tue Mar 29 12:57:56 2016 +0200
CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r [BZ #19879]
The defensive copy is not needed because the name may not alias the
output buffer.
diff --git a/ChangeLog b/ChangeLog
index ce6f8a2..b620bbf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
2016-03-29 Florian Weimer <fweimer@redhat.com>
+ [BZ #19879]
+ CVE-2016-3075
+ * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyname_r): Do not
+ copy name.
+
+2016-03-29 Florian Weimer <fweimer@redhat.com>
+
[BZ #19837]
* nss/nss_db/db-XXX.c (_nss_db_getENTNAME_r): Propagate ERANGE
error if parse_line fails.
diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
index 2eb2f67..8f301a7 100644
--- a/resolv/nss_dns/dns-network.c
+++ b/resolv/nss_dns/dns-network.c
@@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
} net_buffer;
querybuf *orig_net_buffer;
int anslen;
- char *qbuf;
enum nss_status status;
if (__res_maybe_init (&_res, 0) == -1)
return NSS_STATUS_UNAVAIL;
- qbuf = strdupa (name);
-
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
- anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
+ anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
if (anslen < 0)
{
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