UBUNTU-CVE-2019-18840
Dashboard / Vulnerabilities / UBUNTU-CVE-2019-18840
Summary:
Details: 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.
References: https://ubuntu.com/security/CVE-2019-18840, https://github.com/wolfSSL/wolfssl/issues/2555, https://www.cve.org/CVERecord?id=CVE-2019-18840
Affected packages
Package
Name: wolfssl
Purl: pkg:deb/ubuntu/[email protected]+dfsg-3?arch=source&distro=focal
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -4.2.0+dfsg-3
Affected versions
4.1.0+dfsg-2
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
