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authorjc_gargma <jc_gargma@iserlohn-fortress.net>2018-01-12 22:01:17 -0800
committerjc_gargma <jc_gargma@iserlohn-fortress.net>2018-01-12 22:01:17 -0800
commit061d8919639b1bf7b3469ff987a916f7fdff8690 (patch)
treea0be90dcfcab80b85b3a630774f013e5e2e4b9d2 /CVE-2017-8824-dccp-use-after-free-in-DCCP-code.patch
downloadlinux-libre-hardened-061d8919639b1bf7b3469ff987a916f7fdff8690.tar.xz
Initial commit
Diffstat (limited to 'CVE-2017-8824-dccp-use-after-free-in-DCCP-code.patch')
-rw-r--r--CVE-2017-8824-dccp-use-after-free-in-DCCP-code.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/CVE-2017-8824-dccp-use-after-free-in-DCCP-code.patch b/CVE-2017-8824-dccp-use-after-free-in-DCCP-code.patch
new file mode 100644
index 0000000..b033485
--- /dev/null
+++ b/CVE-2017-8824-dccp-use-after-free-in-DCCP-code.patch
@@ -0,0 +1,42 @@
+From 69c64866ce072dea1d1e59a0d61e0f66c0dffb76 Mon Sep 17 00:00:00 2001
+From: Mohamed Ghannam <simo.ghannam@gmail.com>
+Date: Tue, 5 Dec 2017 20:58:35 +0000
+Subject: [PATCH] dccp: CVE-2017-8824: use-after-free in DCCP code
+
+Whenever the sock object is in DCCP_CLOSED state,
+dccp_disconnect() must free dccps_hc_tx_ccid and
+dccps_hc_rx_ccid and set to NULL.
+
+Signed-off-by: Mohamed Ghannam <simo.ghannam@gmail.com>
+Reviewed-by: Eric Dumazet <edumazet@google.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ net/dccp/proto.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/net/dccp/proto.c b/net/dccp/proto.c
+index b68168fcc06a..9d43c1f40274 100644
+--- a/net/dccp/proto.c
++++ b/net/dccp/proto.c
+@@ -259,6 +259,7 @@ int dccp_disconnect(struct sock *sk, int flags)
+ {
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct inet_sock *inet = inet_sk(sk);
++ struct dccp_sock *dp = dccp_sk(sk);
+ int err = 0;
+ const int old_state = sk->sk_state;
+
+@@ -278,6 +279,10 @@ int dccp_disconnect(struct sock *sk, int flags)
+ sk->sk_err = ECONNRESET;
+
+ dccp_clear_xmit_timers(sk);
++ ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
++ ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
++ dp->dccps_hc_rx_ccid = NULL;
++ dp->dccps_hc_tx_ccid = NULL;
+
+ __skb_queue_purge(&sk->sk_receive_queue);
+ __skb_queue_purge(&sk->sk_write_queue);
+--
+2.15.1
+