[kernel] CVE-2013-1763 sock_diag: out-of-bounds access to sock_diag_handlers (rhbz 915052, 915057)
Josh Boyer
jwboyer at fedoraproject.org
Sun Feb 24 19:03:20 UTC 2013
commit 23479883b75c26d9065becfeca340e58d66ae590
Author: Josh Boyer <jwboyer at redhat.com>
Date: Sun Feb 24 13:58:12 2013 -0500
CVE-2013-1763 sock_diag: out-of-bounds access to sock_diag_handlers (rhbz 915052,915057)
kernel.spec | 11 +++-
...ut-of-bounds-access-to-sock_diag_handlers.patch | 86 ++++++++++++++++++++
2 files changed, 96 insertions(+), 1 deletions(-)
---
diff --git a/kernel.spec b/kernel.spec
index f875775..c4c1ee1 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -62,7 +62,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
-%global baserelease 1
+%global baserelease 2
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@@ -733,6 +733,9 @@ Patch21247: ath9k_rx_dma_stop_check.patch
#rhbz 844750
Patch21250: 0001-bluetooth-Add-support-for-atheros-04ca-3004-device-t.patch
+#CVE-2013-1763 rhbz 915052,915057
+Patch21251: sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch
+
#rhbz 812111
Patch21260: alps-v2.patch
@@ -1429,6 +1432,9 @@ ApplyPatch 0001-bluetooth-Add-support-for-atheros-04ca-3004-device-t.patch
#rhbz 812111
ApplyPatch alps-v2.patch
+#CVE-2013-1763 rhbz 915052,915057
+ApplyPatch sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch
+
# END OF PATCH APPLICATIONS
%endif
@@ -2284,6 +2290,9 @@ fi
# ||----w |
# || ||
%changelog
+* Sun Feb 24 2013 Josh Boyer <jwboyer at redhat.com>
+- CVE-2013-1763 sock_diag: out-of-bounds access to sock_diag_handlers (rhbz 915052,915057)
+
* Fri Feb 22 2013 Josh Boyer <jwboyer at redhat.com> - 3.9.0-0.rc0.git5.1
- Linux v3.8-6071-g8b5628a
diff --git a/sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch b/sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch
new file mode 100644
index 0000000..7508a76
--- /dev/null
+++ b/sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch
@@ -0,0 +1,86 @@
+Path: news.gmane.org!not-for-mail
+From: Mathias Krause <minipli at googlemail.com>
+Newsgroups: gmane.linux.network
+Subject: [PATCH 1/2] sock_diag: Fix out-of-bounds access to sock_diag_handlers[]
+Date: Sat, 23 Feb 2013 12:13:47 +0100
+Lines: 28
+Approved: news at gmane.org
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+Cc: netdev at vger.kernel.org, Mathias Krause <minipli at googlemail.com>
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+
+Userland can send a netlink message requesting SOCK_DIAG_BY_FAMILY
+with a family greater or equal then AF_MAX -- the array size of
+sock_diag_handlers[]. The current code does not test for this
+condition therefore is vulnerable to an out-of-bound access opening
+doors for a privilege escalation.
+
+Signed-off-by: Mathias Krause <minipli at googlemail.com>
+---
+ net/core/sock_diag.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
+index 602cd63..750f44f 100644
+--- a/net/core/sock_diag.c
++++ b/net/core/sock_diag.c
+@@ -121,6 +121,9 @@ static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ if (nlmsg_len(nlh) < sizeof(*req))
+ return -EINVAL;
+
++ if (req->sdiag_family >= AF_MAX)
++ return -EINVAL;
++
+ hndl = sock_diag_lock_handler(req->sdiag_family);
+ if (hndl == NULL)
+ err = -ENOENT;
+--
+1.7.10.4
+
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