Candidate: CVE-2019-18840
PublicDate: 2019-11-09 13:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18840
 https://github.com/wolfSSL/wolfssl/issues/2555
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.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
Priority: medium
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H [7.5 HIGH]


Patches_wolfssl:
 upstream: https://github.com/wolfSSL/wolfssl/commit/52f28bd5149360f8e3bf8ca13d3fb9a77283df7c
upstream_wolfssl: released (4.2.0+dfsg-3)
precise/esm_wolfssl: DNE
trusty_wolfssl: ignored (out of standard support)
trusty/esm_wolfssl: DNE
xenial_wolfssl: not-affected (code not present)
bionic_wolfssl: not-affected (code not present)
disco_wolfssl: not-affected (code not present)
eoan_wolfssl: ignored (reached end-of-life)
focal_wolfssl: released (4.2.0+dfsg-3)
devel_wolfssl: released (4.2.0+dfsg-3)