Critical severity · published Sep 24, 2019
CVE-2019-16748
In wolfSSL through 4.1.0, there is a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking
9.8
CVSS
1.2%
EPSS
No
On KEV
Description
In wolfSSL through 4.1.0, there is a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer over-read in CheckCertSignature_ex in wolfcrypt/src/asn.c.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
Wolfssl · Wolfssl
through 4.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16748
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-16748
Third Party Advisory
https://github.com/wolfSSL/wolfssl/issues/2459
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