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.

• CWE-20

• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.htmlMailing List, Third Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.htmlMailing List, Third Party Advisory
• http://www.debian.org/security/2016/dsa-3433Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.htmlThird Party Advisory
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
• http://www.securityfocus.com/bid/79732Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1034493Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-2855-1Third Party Advisory
• http://www.ubuntu.com/usn/USN-2855-2Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1290292Issue Tracking, Third Party Advisory
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=1ba49b8f389eda3414b14410c7fbcb4041ca06b1
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=a819d2b440aafa3138d95ff6e8b824da885a70e9
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=d724f835acb9f4886c0001af32cd325dbbf1f895
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993Third Party Advisory
• https://security.gentoo.org/glsa/201612-47Third Party Advisory
• https://www.samba.org/samba/security/CVE-2015-5296.htmlVendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.htmlMailing List, Third Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.htmlMailing List, Third Party Advisory
• http://www.debian.org/security/2016/dsa-3433Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.htmlThird Party Advisory
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
• http://www.securityfocus.com/bid/79732Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1034493Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-2855-1Third Party Advisory
• http://www.ubuntu.com/usn/USN-2855-2Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1290292Issue Tracking, Third Party Advisory
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=1ba49b8f389eda3414b14410c7fbcb4041ca06b1
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=a819d2b440aafa3138d95ff6e8b824da885a70e9
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=d724f835acb9f4886c0001af32cd325dbbf1f895
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993Third Party Advisory
• https://security.gentoo.org/glsa/201612-47Third Party Advisory
• https://www.samba.org/samba/security/CVE-2015-5296.htmlVendor Advisory

Published

Dec 29, 2015

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2015-5290A Denial of Service vulnerability exists in ircd-ratbox 3.0.…7.5
• CVE-2015-5291Heap-based buffer overflow in PolarSSL 1.x before 1.2.17 and…
• CVE-2015-5292Memory leak in the Privilege Attribute Certificate (PAC) res…
• CVE-2015-5293Red Hat Enterprise Virtualization Manager 3.6 and earlier gi…
• CVE-2015-5294Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultI…
• CVE-2015-5295The template-validate command in OpenStack Orchestration API…
• CVE-2015-5297An integer overflow issue has been reported in the general_c…6.7
• CVE-2015-5298The Google Login Plugin (versions 1.0 and 1.1) allows malici…6.5
• CVE-2015-5299The shadow_copy2_get_shadow_copy_data function in modules/vf…5.3
• CVE-2015-5300The panic_gate check in NTP before 4.2.8p5 is only re-enable…
• CVE-2015-5301providers/saml2/admin.py in the Identity Provider (IdP) serv…
• CVE-2015-5302libreport 2.0.7 before 2.6.3 only saves changes to the first…