CVE-2015-5296 Security feature bypass in n/a

What is CVE-2015-5296?

CVE-2015-5296 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 29 Dec 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-20

Which versions are affected by CVE-2015-5296?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Samba Samba.

How do I fix CVE-2015-5296?

Upgrade to a fixed version.

Is CVE-2015-5296 being exploited?

There is no known exploitation of CVE-2015-5296 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-5296, ECHO-f063-8083-52bc, GHSA-pcgp-3vvv-qw57, UBUNTU-CVE-2015-5296.