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package/glibc: Add security patches to fix CVE-2016-3075

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Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Bernd Kuhls 2016-04-24 21:50:19 +02:00 committed by Thomas Petazzoni
parent 302563539d
commit f63ec06a13
2 changed files with 91 additions and 0 deletions
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44
package/glibc/2.22/0003-fix-CVE-2016-3075.patch Normal file
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@ -0,0 +1,44 @@
From 883dceebc8f11921a9890211a4e202e5be17562f Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 29 Mar 2016 12:57:56 +0200
Subject: [PATCH 1/1] 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.
(cherry picked from commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4)
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
(downloaded from upstream git repo and removed changes to Changelog:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=883dceebc8f11921a9890211a4e202e5be17562f;hp=5a1a5f0dd2744044801c91bf2588444c29cda533)
---
ChangeLog | 7 +++++++
resolv/nss_dns/dns-network.c | 5 +----
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
index 00f4490..89f8783 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)
{
--
1.7.1

47
package/glibc/2.23/0001-fix-CVE-2016-3075.patch Normal file
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@ -0,0 +1,47 @@
From 146b58d11fddbef15b888906e3be4f33900c416f Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 29 Mar 2016 12:57:56 +0200
Subject: [PATCH 1/1] 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.
(cherry picked from commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4)
(cherry picked from commit 883dceebc8f11921a9890211a4e202e5be17562f)
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
(downloaded from upstream git repo and removed changes to files
Changelog and NEWS:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=146b58d11fddbef15b888906e3be4f33900c416f;hp=0eb234232eaf925fe4dca3bd60a3e1b4a7ab2882)
---
ChangeLog | 7 +++++++
NEWS | 10 ++++++++--
resolv/nss_dns/dns-network.c | 5 +----
3 files changed, 16 insertions(+), 6 deletions(-)
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)
{
--
1.7.1