Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2018-10933 |
CWE-ID | CWE-592 |
Exploitation vector | Network |
Public exploit | Public exploit code for vulnerability #1 is available. |
Vulnerable software Subscribe |
Debian Linux Operating systems & Components / Operating system |
Vendor | Debian |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU15379
Risk: Low
CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID: CVE-2018-10933
CWE-ID:
CWE-592 - Authentication Bypass Issues
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to bypass authentication on the target system.
The weakness exists due to coding error, when libssh receives the "SSH2_MSG_USERAUTH_SUCCESS" message. A remote attacker can send the SSH server "SSH2_MSG_USERAUTH_SUCCESS" message instead of the "SSH2_MSG_USERAUTH_REQUEST" message that a server usually expects and which libssh uses as a sign that an authentication procedure needs to initiate, bypass authentication procedures and gain access to a server with an SSH connection enabled without having to enter the password.
Update the affected package to version: 0.7.3-2+deb9u1
Vulnerable software versionsDebian Linux: All versions
External linkshttp://www.debian.org/security/2018/dsa-4322
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.