What’s Vulnerable › Vulnerabilities

CVE-2015-3146

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-04-13 · updated 2026-06-17

Description

The (1) SSH_MSG_NEWKEYS and (2) SSH_MSG_KEXDH_REPLY packet handlers in package_cb.c in libssh before 0.6.5 do not properly validate state, which allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted SSH packet.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 15.10
• Debian Linux: 7.0, 8.0
• Fedoraproject Fedora: 21, 22
• libssh: through 0.6.4

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html
• http://www.debian.org/security/2016/dsa-3488
• http://www.ubuntu.com/usn/USN-2912-1
• https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f
• https://www.libssh.org/2015/04/30/libssh-0-6-5-security-and-bugfix-release/
• https://www.libssh.org/security/advisories/CVE-2015-3146.txt
• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161802.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158013.html
• http://www.debian.org/security/2016/dsa-3488
• http://www.ubuntu.com/usn/USN-2912-1
• https://git.libssh.org/projects/libssh.git/commit/?h=libssh-0.6.5&id=94f6955fbaee6fda9385a23e505497efe21f5b4f

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