Allele Security Intelligence

ASA-2019-00526 – wolfSSL wolfCrypt: Out-of-bounds read in GetLength_ex()

Posted on September 2, 2019September 4, 2019 by Allele Security Intelligence in Alerts

wolfSSL 4.1.0 has a one-byte heap-based buffer over-read in DecodeCertExtensions() and DecodeOcspRespExtensions() in wolfcrypt/src/asn.c because reading the ASN_BOOLEAN byte is mishandled for a crafted DER certificate in GetLength_ex().