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Don't accept 0-length ASN.1 integers for decoding

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This commit is contained in:
Isaac Klein 2024-08-21 14:02:26 -04:00
parent 9c413abee1
commit 3fb7bd92cc
1 changed files with 1 additions and 1 deletions
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winpr/libwinpr/utils/asn1/asn1.c
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@ -1020,7 +1020,7 @@ static size_t WinPrAsn1DecReadIntegerLike(WinPrAsn1Decoder* dec, WinPrAsn1_tag e
size_t ret = readTagAndLen(dec, &dec->source, &tag, &len);
if (!ret || (tag != expectedTag))
return 0;
if (!Stream_CheckAndLogRequiredLength(TAG, &dec->source, len) || (len > 4))
if (len == 0 || !Stream_CheckAndLogRequiredLength(TAG, &dec->source, len) || (len > 4))
return 0;
WinPrAsn1_INTEGER val = 0;