From: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
To: netdev@vger.kernel.org
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Thadeu Lima de Souza Cascardo <cascardo@canonical.com>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
"Alexander A. Klimov" <grandmaster@al2klimov.de>,
Kees Cook <keescook@chromium.org>,
Eric Dumazet <edumazet@google.com>,
Alexey Kodanev <alexey.kodanev@oracle.com>,
dccp@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] net: dccp: fix structure use-after-free
Date: Tue, 13 Oct 2020 19:18:47 +0200 [thread overview]
Message-ID: <20201013171849.236025-1-kleber.souza@canonical.com> (raw)
This patchset addresses the following CVE:
CVE-2020-16119 - DCCP CCID structure use-after-free
Hadar Manor reported that by reusing a socket with an attached
dccps_hc_tx_ccid as a listener, it will be used after being released,
leading to DoS and potentially code execution.
The first patch moves the ccid timers to struct dccp_sock to avoid its
use-after-free, the second patch reverts 2677d2067731 "dccp: don't free
ccid2_hc_tx_sock struct in dccp_disconnect()" that's not needed anymore
and would cause another use-after-free.
Thadeu Lima de Souza Cascardo (2):
dccp: ccid: move timers to struct dccp_sock
Revert "dccp: don't free ccid2_hc_tx_sock struct in dccp_disconnect()"
include/linux/dccp.h | 2 ++
net/dccp/ccids/ccid2.c | 32 +++++++++++++++++++-------------
net/dccp/ccids/ccid3.c | 30 ++++++++++++++++++++----------
net/dccp/proto.c | 2 ++
4 files changed, 43 insertions(+), 23 deletions(-)
--
2.25.1
next reply other threads:[~2020-10-13 17:18 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-13 17:18 Kleber Sacilotto de Souza [this message]
2020-10-13 17:18 ` [PATCH 1/2] dccp: ccid: move timers to struct dccp_sock Kleber Sacilotto de Souza
2020-10-13 18:58 ` Richard Sailer
2020-10-15 3:43 ` Jakub Kicinski
2020-10-15 10:53 ` Thadeu Lima de Souza Cascardo
2020-10-16 22:30 ` Jakub Kicinski
2020-11-09 11:48 ` Thadeu Lima de Souza Cascardo
2020-11-09 17:49 ` Jakub Kicinski
2020-11-09 21:09 ` Thadeu Lima de Souza Cascardo
2020-11-09 21:15 ` Jakub Kicinski
2020-11-09 21:31 ` Thadeu Lima de Souza Cascardo
2020-11-09 22:15 ` Jakub Kicinski
2020-11-10 11:19 ` Thadeu Lima de Souza Cascardo
2020-11-10 16:16 ` Jakub Kicinski
2020-10-13 17:18 ` [PATCH 2/2] Revert "dccp: don't free ccid2_hc_tx_sock struct in dccp_disconnect()" Kleber Sacilotto de Souza
2020-10-13 18:59 ` Richard Sailer
2020-10-15 3:42 ` Jakub Kicinski
2020-10-15 9:23 ` Kleber Souza
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