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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.073 (94.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.073 · newest: 0.073 · change: 0.000
Affected products
- Samba
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.04
- Debian Linux — versions 7.0, 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.samba.org/
- lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html (vendor-advisory, Mailing List, Third Party Advisory)
- git.samba.org/
- lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.ubuntu.com/usn/USN-2855-2 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/79732 (VDB Entry, Third Party Advisory, vdb-entry)
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.