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src/Mayaqua/Str.c: fix denial of service reported by Cisco Talos
TALOS-2023-1741 CVE-2023-23581 SoftEther VPN vpnserver EnSafeHttpHeaderValueStr denial of service vulnerability A denial of service vulnerability exists in the vpnserver EnSafeHttpHeaderValueStr functionality of SoftEther VPN 5.01.9674 and 5.02. A specially-crafted network packet can lead to denial of service.
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@ -2062,11 +2062,11 @@ void EnSafeHttpHeaderValueStr(char *str, char replace)
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length = StrLen(str);
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while (index < length)
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{
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if (str[index] == '\r' || str[index] == '\n')
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if ((str[index] == '\r' || str[index] == '\n') && length - index > 1)
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{
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if (replace == ' ')
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{
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Move(&str[index], &str[index + 1], length - index);
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Move(&str[index], &str[index + 1], length - index - 1);
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}
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else
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{
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@ -2075,12 +2075,12 @@ void EnSafeHttpHeaderValueStr(char *str, char replace)
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}
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else if (str[index] == '\\')
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{
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if (str[index + 1] == 'r' || str[index + 1] == 'n')
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if ((str[index + 1] == 'r' || str[index + 1] == 'n') && length - index > 2)
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{
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if (replace == ' ')
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{
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Move(&str[index], &str[index + 2], length - index);
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index--;
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Move(&str[index], &str[index + 2], length - index - 2);
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index++;
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}
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else
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{
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