Wolfssh: >> Wolfssh >> 1.4.7 Security Vulnerabilities
wolfSSH’s key exchange state machine can be manipulated to leak the client’s password in the clear, trick the client to send a bogus signature, or trick the client into skipping user authentication. This affects client applications with wolfSSH version 1.4.21 and earlier. Users of wolfSSH must update or apply the fix patch and it’s recommended to update credentials used. This fix is also recommended for wolfSSH server applications. While there aren’t any specific attacks on server applications, the same defect is present. Thanks to Aina Toky Rasoamanana of Valeo and Olivier Levillain of Telecom SudParis for the report.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-01-06
Potential stack buffer overwrite on the SFTP server side when receiving a malicious packet that has a handle size larger than the system handle or file descriptor size, but smaller than max handle size allowed.
CVSS Score
9.8
EPSS Score
0.001
Published
2025-10-21
Improper host authentication vulnerability in wolfSSH version 1.4.20 and earlier clients that allows authentication bypass and leaking of clients credentials.
CVSS Score
9.8
EPSS Score
0.001
Published
2025-10-21
A vulnerability was found in wolfSSH's server-side state machine before versions 1.4.17. A malicious client could create channels without first performing user authentication, resulting in unauthorized access.
CVSS Score
9.1
EPSS Score
0.003
Published
2024-03-25
WolfSSH v1.4.7 was discovered to contain an integer overflow via the function wolfSSH_SFTP_RecvRMDIR.
CVSS Score
9.8
EPSS Score
0.013
Published
2022-07-13