RCE in Samba

CVE-2016-2119

libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.031 (86.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

  • Samba
  • N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2016-2119?
CVE-2016-2119 is a high-severity vulnerability in Samba, classified under Code Injection. CVSS score: 7.5/10. Published 2016-07-07.
How severe is CVE-2016-2119?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2016-2119 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.