From caa91d5e4f58311581a830ddc89c73e07df71387 Mon Sep 17 00:00:00 2001 From: Andreas Wellving Date: Tue, 21 May 2019 16:18:43 +0200 Subject: dccp: CVE-2017-8824 dccp: CVE-2017-8824: use-after-free in DCCP code Reference: https://nvd.nist.gov/vuln/detail/CVE-2017-8824 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=e5e1e153ecd40c2b09c23d2b2c161a6c8ddbba07 Change-Id: Ic8d564518bde1ca36f0b9c54f1fa603e8778c92b Signed-off-by: Andreas Wellving --- ...CVE-2017-8824-use-after-free-in-DCCP-code.patch | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 patches/cve/CVE-2017-8824-dccp-CVE-2017-8824-use-after-free-in-DCCP-code.patch diff --git a/patches/cve/CVE-2017-8824-dccp-CVE-2017-8824-use-after-free-in-DCCP-code.patch b/patches/cve/CVE-2017-8824-dccp-CVE-2017-8824-use-after-free-in-DCCP-code.patch new file mode 100644 index 0000000..964e1c1 --- /dev/null +++ b/patches/cve/CVE-2017-8824-dccp-CVE-2017-8824-use-after-free-in-DCCP-code.patch @@ -0,0 +1,49 @@ +From e5e1e153ecd40c2b09c23d2b2c161a6c8ddbba07 Mon Sep 17 00:00:00 2001 +From: Mohamed Ghannam +Date: Tue, 5 Dec 2017 20:58:35 +0000 +Subject: [PATCH] dccp: CVE-2017-8824: use-after-free in DCCP code + +commit 69c64866ce072dea1d1e59a0d61e0f66c0dffb76 upstream. + +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. + +CVE: CVE-2017-8824 +Upstream-Status: Backport [https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=e5e1e153ecd40c2b09c23d2b2c161a6c8ddbba07] + +Signed-off-by: Mohamed Ghannam +Reviewed-by: Eric Dumazet +Signed-off-by: David S. Miller +Signed-off-by: Greg Kroah-Hartman +Signed-off-by: Andreas Wellving +--- + 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); +-- +2.20.1 + -- cgit v1.2.3-54-g00ecf