Auth bypass in Samba
CVE-2016-2124
A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to retrieve the plaintext password sent over the wire even if Kerberos authentication was required.
Vulnerability class: Broken Authentication
EPSS: 0.018 (75.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Samba
- Canonical Ubuntu_linux — versions 18.04, 20.04, 21.04
- Debian Debian_linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 33, 34, 35
- Redhat Codeready_linux_builder
- Redhat Enterprise_linux — versions 7.0, 8.0
- Redhat Enterprise_linux_desktop — versions 7.0
- Redhat Enterprise_linux_eus — versions 8.2, 8.4
- Redhat Enterprise_linux_for_ibm_z_systems — versions 7.0, 8.0
- Redhat Enterprise_linux_for_ibm_z_systems_eus — versions 8.2, 8.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Mitigation, Vendor Advisory)
- secalert@redhat.com (mailing-list)
- secalert@redhat.com (vendor-advisory)
Frequently asked questions
- What is CVE-2016-2124?
- CVE-2016-2124 is a medium-severity vulnerability in Samba, classified under Improper Authentication. CVSS score: 5.9/10. Published 2022-02-18.
- How severe is CVE-2016-2124?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2016-2124 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.