[hardy,CVE,1/1] Bluetooth: bnep: fix buffer overflow
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Message ID 1311706273-14191-2-git-send-email-apw@canonical.com
State New
Headers show

Commit Message

Andy Whitcroft July 26, 2011, 6:51 p.m. UTC
From: Vasiliy Kulikov <segoon@openwall.com>

Struct ca is copied from userspace.  It is not checked whether the "device"
field is NULL terminated.  This potentially leads to BUG() inside of
alloc_netdev_mqs() and/or information leak by creating a device with a name
made of contents of kernel stack.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

(cherry picked from commit 43629f8f5ea32a998d06d1bb41eefa0e821ff573)
BugLink: http://bugs.launchpad.net/bugs/816544
Signed-off-by: Andy Whitcroft <apw@canonical.com>
 net/bluetooth/bnep/sock.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

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diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index 9ebd3c6..7d31198 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -97,6 +97,7 @@  static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
 			return -EBADFD;
+		ca.device[sizeof(ca.device)-1] = 0;
 		err = bnep_add_connection(&ca, nsock);
 		if (!err) {