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Fix integer overflow, CVE-2008-1771

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Fix integer overflow leading to heap-based buffer overflow causing a
remote Denial of Service and possibly allows to execute arbitrary code.
This commit is contained in:
Nico Golde 2009-04-02 12:59:31 +02:00 committed by Julien BLACHE
parent 5d227e85c5
commit 567bd3ee03
1 changed files with 6 additions and 1 deletions
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7
src/webserver.c
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@ -716,7 +716,12 @@ int ws_getpostvars(WS_CONNINFO *pwsc) {
return FALSE;
}
length=atoi(content_length);
length=strtol(content_length, NULL, 10);
if(EINVAL == errno || UINT_MAX - 1 <= length){
ws_dprintf(L_WS_WARN, "Thread %d: Suspicious Content-Length value, ignoring request\n", pwsc->threadno);
return FALSE;
}
ws_dprintf(L_WS_DBG,"Thread %d: Post var length: %d\n",
pwsc->threadno,length);