CVE-2015-3146

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.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 1.40% Top 25%

Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory libssh.org Vendor Advisory libssh.org

Affected: n/a n/a

References

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

Frequently Asked Questions

What is the severity of CVE-2015-3146?: CVE-2015-3146 has been scored as a high severity vulnerability.
How to fix CVE-2015-3146?: To fix CVE-2015-3146, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-3146 being actively exploited in the wild?: It is possible that CVE-2015-3146 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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