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| author | Mauro Matteo Cascella <mcascell@redhat.com> | 2022-09-25 22:45:11 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2022-10-11 15:30:27 +0200 |
| commit | d307040b18bfcb1393b910f1bae753d5c12a4dc7 (patch) | |
| tree | 11b4dcdb7576102e8b9fc71f0401a2c15b78d4ed /chardev/char-pty.c | |
| parent | b6d93282ccac79e42d87d02652db353894cd1db9 (diff) | |
| download | qemu-d307040b18bfcb1393b910f1bae753d5c12a4dc7.zip qemu-d307040b18bfcb1393b910f1bae753d5c12a4dc7.tar.gz qemu-d307040b18bfcb1393b910f1bae753d5c12a4dc7.tar.bz2 | |
ui/vnc-clipboard: fix integer underflow in vnc_client_cut_text_ext
Extended ClientCutText messages start with a 4-byte header. If len < 4,
an integer underflow occurs in vnc_client_cut_text_ext. The result is
used to decompress data in a while loop in inflate_buffer, leading to
CPU consumption and denial of service. Prevent this by checking dlen in
protocol_client_msg.
Fixes: CVE-2022-3165
Fixes: 0bf41cab93e5 ("ui/vnc: clipboard support")
Reported-by: TangPeng <tangpeng@qianxin.com>
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Message-Id: <20220925204511.1103214-1-mcascell@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'chardev/char-pty.c')
0 files changed, 0 insertions, 0 deletions