CVE-2015-5296

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Summary

CVECVE-2015-5296
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-12-29 22:59:02 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionSamba 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.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-20 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:M/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Samba Samba All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[security-announce] SUSE-SU-2015:2304-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[security-announce] SUSE-SU-2016:0164-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
USN-2855-1: Samba vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com Third Party Advisory
git.samba.org - samba.git/commit af854a3a-2127-422b-91ae-364da2661108 git.samba.org
[security-announce] openSUSE-SU-2015:2354-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[security-announce] openSUSE-SU-2016:1064-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-3433-1 samba af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
[security-announce] SUSE-SU-2016:0032-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[SECURITY] Fedora 22 Update: samba-4.2.7-0.fc22 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
USN-2855-2: Samba regression | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com Third Party Advisory
Samba: Multiple vulnerabilities (GLSA 201612-47) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
git.samba.org - samba.git/commit af854a3a-2127-422b-91ae-364da2661108 git.samba.org
Samba Multiple Flaws Let Remote Users Access Data and Files, Obtain Potentially Sensitive Information, and Deny Service - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
git.samba.org - samba.git/commit af854a3a-2127-422b-91ae-364da2661108 git.samba.org
Oracle Solaris Bulletin - January 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
Samba CVE-2015-5296 Man in the Middle Multiple Security Bypass Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
Bug 1290292 – CVE-2015-5296 samba: client requesting encryption vulnerable to downgrade attack af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
Oracle Linux Bulletin - January 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
Samba - Security Announcement Archive af854a3a-2127-422b-91ae-364da2661108 www.samba.org Vendor Advisory
[security-announce] openSUSE-SU-2015:2356-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[security-announce] openSUSE-SU-2016:1107-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com Third Party Advisory
[security-announce] SUSE-SU-2015:2305-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[security-announce] openSUSE-SU-2016:1106-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[SECURITY] Fedora 23 Update: samba-4.3.3-0.fc23 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
git.samba.org - samba.git/commit MITRE git.samba.org
git.samba.org - samba.git/commit MITRE git.samba.org
git.samba.org - samba.git/commit MITRE git.samba.org
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