CVE-2016-0787

Description

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.06% Top 15%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory libssh2.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html vendor advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10156
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
https://www.libssh2.org/CVE-2016-0787.patch patch
https://www.libssh2.org/adv_20160223.html vendor advisory
https://puppet.com/security/cve/CVE-2016-0787
http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html vendor advisory
https://security.gentoo.org/glsa/201606-12 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html vendor advisory
https://bto.bluecoat.com/security-advisory/sa120
http://www.debian.org/security/2016/dsa-3487 vendor advisory
http://www.securityfocus.com/bid/82514 vdb entry

Frequently Asked Questions

What is the severity of CVE-2016-0787?
CVE-2016-0787 has been scored as a medium severity vulnerability.
How to fix CVE-2016-0787?
To fix CVE-2016-0787, 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-2016-0787 being actively exploited in the wild?
It is possible that CVE-2016-0787 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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