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| author | Kangjie Lu <kangjielu@gmail.com> | 2016-05-08 12:10:14 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-06-15 21:28:15 +0100 |
| commit | 132c5255a23f505ffefe03cfc1f01ee9c82f3e09 (patch) | |
| tree | 387d9dbd4b30bc367389f2413ef9b7fd4b03eb7c | |
| parent | 114253841cddf0f87b19ab8b0091abea41c58735 (diff) | |
| download | linux-stable-132c5255a23f505ffefe03cfc1f01ee9c82f3e09.tar.gz linux-stable-132c5255a23f505ffefe03cfc1f01ee9c82f3e09.tar.bz2 linux-stable-132c5255a23f505ffefe03cfc1f01ee9c82f3e09.zip | |
net: fix a kernel infoleak in x25 module
commit 79e48650320e6fba48369fccf13fd045315b19b8 upstream.
Stack object "dte_facilities" is allocated in x25_rx_call_request(),
which is supposed to be initialized in x25_negotiate_facilities.
However, 5 fields (8 bytes in total) are not initialized. This
object is then copied to userland via copy_to_user, thus infoleak
occurs.
Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | net/x25/x25_facilities.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/x25/x25_facilities.c b/net/x25/x25_facilities.c index 36384a1fa9f2..887749c8054d 100644 --- a/net/x25/x25_facilities.c +++ b/net/x25/x25_facilities.c @@ -271,6 +271,7 @@ int x25_negotiate_facilities(struct sk_buff *skb, struct sock *sk, memset(&theirs, 0, sizeof(theirs)); memcpy(new, ours, sizeof(*new)); + memset(dte, 0, sizeof(*dte)); len = x25_parse_facilities(skb, &theirs, dte, &x25->vc_facil_mask); if (len < 0) |