Dropbear Ssh Project: >> Dropbear Ssh >> 2016.74 Security Vulnerabilities
An issue was discovered in Dropbear through 2020.81. Due to a non-RFC-compliant check of the available authentication methods in the client-side SSH code, it is possible for an SSH server to change the login process in its favor. This attack can bypass additional security measures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker to abuse a forwarded agent for logging on to another server unnoticed.
CVSS Score
7.5
EPSS Score
0.019
Published
2022-10-12
scp.c in Dropbear before 2020.79 mishandles the filename of . or an empty filename, a related issue to CVE-2018-20685.
CVSS Score
8.1
EPSS Score
0.019
Published
2021-02-25
Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.
CVSS Score
5.3
EPSS Score
0.012
Published
2020-12-30
The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerability because username validity affects how fields in SSH_MSG_USERAUTH messages are handled, a similar issue to CVE-2018-15473 in an unrelated codebase.
CVSS Score
5.3
EPSS Score
0.027
Published
2018-08-21
The server in Dropbear before 2017.75 might allow post-authentication root remote code execution because of a double free in cleanup of TCP listeners when the -a option is enabled.
CVSS Score
8.8
EPSS Score
0.057
Published
2017-05-19
Dropbear before 2017.75 might allow local users to read certain files as root, if the file has the authorized_keys file format with a command= option. This occurs because ~/.ssh/authorized_keys is read with root privileges and symlinks are followed.
CVSS Score
4.7
EPSS Score
0.003
Published
2017-05-19