CVE-2019-18840 | BDVDB-2026-125645 Detail

Description#

In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer overflow inside the DecodedCert structure in GetName in wolfcrypt/src/asn.c because the domain name location index is mishandled. Because a pointer is overwritten, there is an invalid free.

Impact#

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Exploit#

History#

1. Version 12019-11-09Record published in the CVE List.
2. Version 22024-08-05Most recent update recorded in the CVE List.