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| author | Namjae Jeon <linkinjeon@kernel.org> | 2023-08-25 17:40:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-06 23:26:59 +0300 |
| commit | 30fd6521b2fbd9b767e438e31945e5ea3e3a2fba (patch) | |
| tree | 29edc45875155b361d05a783164e40230a6905d3 /fs | |
| parent | 7d8855fd849d9c3186a9e1d3085ea4aedc6e019f (diff) | |
| download | linux-30fd6521b2fbd9b767e438e31945e5ea3e3a2fba.tar.xz | |
ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()
commit 4b081ce0d830b684fdf967abc3696d1261387254 upstream.
If authblob->SessionKey.Length is bigger than session key
size(CIFS_KEY_SIZE), slub overflow can happen in key exchange codes.
cifs_arc4_crypt copy to session key array from SessionKey from client.
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-21940
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/smb/server/auth.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/smb/server/auth.c b/fs/smb/server/auth.c index 5e5e120edcc2..15e5684e328c 100644 --- a/fs/smb/server/auth.c +++ b/fs/smb/server/auth.c @@ -355,6 +355,9 @@ int ksmbd_decode_ntlmssp_auth_blob(struct authenticate_message *authblob, if (blob_len < (u64)sess_key_off + sess_key_len) return -EINVAL; + if (sess_key_len > CIFS_KEY_SIZE) + return -EINVAL; + ctx_arc4 = kmalloc(sizeof(*ctx_arc4), GFP_KERNEL); if (!ctx_arc4) return -ENOMEM; |