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."
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libssh2 | Aug 30, 2017 | Apr 13, 2016 |
| Centos_linux | — | Upgrade libssh2-docsUpgrade libssh2Upgrade libssh2-devel | Jul 6, 2016 | Mar 10, 2016 |
| Debian | — | Upgrade libssh2 | Mar 11, 2016 | Feb 23, 2016 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Aug 11, 2016 |
| Gentoo Linux | — | Upgrade net-libs/libssh2.Upgrade net-libs/libssh. | Oct 30, 2017 | Apr 13, 2016 |
| Huawei Euleros 2_0_sp1 | — | Upgrade libssh2 | Nov 30, 2017 | Apr 13, 2016 |
| Oracle Solaris | — | Upgrade library/libssh2 to version 1.7.0-0.175.3.14.0.4.0 on Solaris 11.3 | May 29, 2017 | Apr 13, 2016 |
| Oracle_linux | — | Upgrade libssh2Upgrade libssh2-develUpgrade libssh2-docs | Apr 13, 2016 | Apr 13, 2016 |
| Suse | — | Upgrade libssh2-1-32bitUpgrade libssh2-develUpgrade libssh2-1-x86Upgrade sles12sp1-docker-imageUpgrade sles12-docker-imageUpgrade libssh2-1 | Apr 13, 2016 | Apr 13, 2016 |
| Ubuntu | — | Upgrade libssh2 | Nov 19, 2024 | Apr 13, 2016 |
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