CVE-2015-5296

MEDIUM
5.4
CVSS Score
Published: December 29, 2015 at 10:00 PM UTC
Updated: June 17, 2026 at 12:28 AM UTC
3 products affected across 3 vendorsDebian LinuxUbuntu LinuxSAMBA

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Severity
MEDIUM5.4
Exploit prediction
EPSS 7%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.2.0 ≤ v < 4.1.224.2.0 ≤ v < 4.2.74.3.0 ≤ v < 4.3.3
Affected range stops below 4.1.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.3, so it looks safe — our inference, not a vendor statement

References (25)

Vendor Advisoryx_refsource_FEDORAMailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html
Vendor Advisoryx_refsource_FEDORAMailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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