CVE-2013-1763 sock_diag: out-of-bounds access to sock_diag_handlers (rhbz 915052,915057)
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Josh Boyer
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11
kernel.spec
11
kernel.spec
@ -62,7 +62,7 @@ Summary: The Linux kernel
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# For non-released -rc kernels, this will be appended after the rcX and
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# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
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#
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%global baserelease 1
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%global baserelease 2
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%global fedora_build %{baserelease}
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# base_sublevel is the kernel version we're starting with and patching
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@ -733,6 +733,9 @@ Patch21247: ath9k_rx_dma_stop_check.patch
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#rhbz 844750
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Patch21250: 0001-bluetooth-Add-support-for-atheros-04ca-3004-device-t.patch
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#CVE-2013-1763 rhbz 915052,915057
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Patch21251: sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch
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#rhbz 812111
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Patch21260: alps-v2.patch
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@ -1429,6 +1432,9 @@ ApplyPatch 0001-bluetooth-Add-support-for-atheros-04ca-3004-device-t.patch
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#rhbz 812111
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ApplyPatch alps-v2.patch
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#CVE-2013-1763 rhbz 915052,915057
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ApplyPatch sock_diag-Fix-out-of-bounds-access-to-sock_diag_handlers.patch
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# END OF PATCH APPLICATIONS
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%endif
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@ -2284,6 +2290,9 @@ fi
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# ||----w |
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# || ||
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%changelog
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* Sun Feb 24 2013 Josh Boyer <jwboyer@redhat.com>
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- CVE-2013-1763 sock_diag: out-of-bounds access to sock_diag_handlers (rhbz 915052,915057)
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* Fri Feb 22 2013 Josh Boyer <jwboyer@redhat.com> - 3.9.0-0.rc0.git5.1
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- Linux v3.8-6071-g8b5628a
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@ -0,0 +1,86 @@
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Path: news.gmane.org!not-for-mail
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From: Mathias Krause <minipli@googlemail.com>
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Newsgroups: gmane.linux.network
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Subject: [PATCH 1/2] sock_diag: Fix out-of-bounds access to sock_diag_handlers[]
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Date: Sat, 23 Feb 2013 12:13:47 +0100
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Lines: 28
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Approved: news@gmane.org
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Message-ID: <1361618028-9024-2-git-send-email-minipli@googlemail.com>
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References: <1361618028-9024-1-git-send-email-minipli@googlemail.com>
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NNTP-Posting-Date: Sat, 23 Feb 2013 11:14:29 +0000 (UTC)
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Cc: netdev@vger.kernel.org, Mathias Krause <minipli@googlemail.com>
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To: "David S. Miller" <davem@davemloft.net>
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Original-X-From: netdev-owner@vger.kernel.org Sat Feb 23 12:14:49 2013
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Xref: news.gmane.org gmane.linux.network:260061
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Archived-At: <http://permalink.gmane.org/gmane.linux.network/260061>
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Userland can send a netlink message requesting SOCK_DIAG_BY_FAMILY
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with a family greater or equal then AF_MAX -- the array size of
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sock_diag_handlers[]. The current code does not test for this
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condition therefore is vulnerable to an out-of-bound access opening
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doors for a privilege escalation.
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Signed-off-by: Mathias Krause <minipli@googlemail.com>
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---
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net/core/sock_diag.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
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index 602cd63..750f44f 100644
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--- a/net/core/sock_diag.c
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+++ b/net/core/sock_diag.c
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@@ -121,6 +121,9 @@ static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
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if (nlmsg_len(nlh) < sizeof(*req))
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return -EINVAL;
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+ if (req->sdiag_family >= AF_MAX)
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+ return -EINVAL;
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+
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hndl = sock_diag_lock_handler(req->sdiag_family);
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if (hndl == NULL)
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err = -ENOENT;
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--
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1.7.10.4
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