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Properly handle the case of SetPixelEncodings with a length of zero.

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This commit addresses CORE-2008-1210/CVE-2008-2382.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6121 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-12-22 21:06:23 +00:00
parent b1503cda1e
commit 69dd5c9ffd
1 changed files with 6 additions and 3 deletions
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9
vnc.c
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@ -1503,10 +1503,13 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
if (len == 1)
return 4;
if (len == 4)
return 4 + (read_u16(data, 2) * 4);
if (len == 4) {
limit = read_u16(data, 2);
if (limit > 0)
return 4 + (limit * 4);
} else
limit = read_u16(data, 2);
limit = read_u16(data, 2);
for (i = 0; i < limit; i++) {
int32_t val = read_s32(data, 4 + (i * 4));
memcpy(data + 4 + (i * 4), &val, sizeof(val));