Improper input validation in Samba

CVE-2015-5296

Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.073 (93.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2015-5296?
CVE-2015-5296 is a medium-severity vulnerability in Samba, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2015-12-29.
How severe is CVE-2015-5296?
Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2015-5296 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.