CVE-2015-5296: canonical ubuntu_linux Improper Input Validation
CVSS: 5.4v3.1MediumModified
AliasesUBUNTU-CVE-2015-5296DEBIAN-CVE-2015-5296
Published 29-12-2015Last modified 06-08-2024
Vulnerability summary
CVE-2015-5296 is a medium (CVSS 5.4) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 7.26% chance of exploitation in the next 30 days, higher than 94.2% of scored vulnerabilities.
CVSS score
5.4/10
010
Medium · v3.1 (NVD)EPSS score
7.26%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 14 · Related 6Timeline
- 29-12-2015PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 3 sources · 3 versionsMedium 5.4Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Medium 5.4Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:NSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
7.26%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 7.26% on 20-09-2026
20-09-202620-10-2026
EPSS score7.26%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- samba< 2:4.1.22+dfsg-1
- debian_linuxEOL7.0 | 8.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.04 | 15.10
Samba1 product
- samba≥ 3.2.0, < 4.1.22 | ≥ 4.2.0, < 4.2.7 | ≥ 4.3.0, < 4.3.3
Ubuntu1 product
- samba< 2:4.1.6+dfsg-1ubuntu2.14.04.11 | < 2:4.3.3+dfsg-1ubuntu1
4 vendors · 5 products
References
29 links- lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.htmlVendor AdvisoryX Refsource FEDORAMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlX Refsource CONFIRMThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 29 references
- lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.htmlVendor AdvisoryX Refsource FEDORAMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993X Refsource CONFIRMThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.htmlX Refsource CONFIRMThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory