VDB
CVE-2019-18840
CVE-2019-18840
PUBLISHED
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.
EPSS 1.97% · 78.9th percentile
Risk Scores
EPSS Score
1.97%
78.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | wolfssl | 0, 4.1.0+dfsg-2, 4.2.0+dfsg-1 |
Timeline
- Nov 9, 2019 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Nov 7, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2019-18840 third-party-advisory
- https://github.com/wolfSSL/wolfssl/issues/2555 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2019-18840 third-party-advisory