Debian Security Advisory DSA-3626-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
July 24, 2016 https://www.debian.org/security/faq
Package : openssh
CVE ID : CVE-2016-6210
Debian Bug : 831902
Eddie Harari reported that the OpenSSH SSH daemon allows user
enumeration through timing differences when trying to authenticate
users. When sshd tries to authenticate a non-existing user, it will pick
up a fixed fake password structure with a hash based on the Blowfish
algorithm. If real users passwords are hashed using SHA256/SHA512, then
a remote attacker can take advantage of this flaw by sending large
passwords, receiving shorter response times from the server for
non-existing users.
For the stable distribution (jessie), this problem has been fixed in
version 1:6.7p1-5+deb8u3.
For the unstable distribution (sid), this problem has been fixed in
version 1:7.2p2-6.
We recommend that you upgrade your openssh packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: [email protected]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 8 | i386 | openssh-server-udeb | < 6.7p1-5+deb8u3 | openssh-server-udeb_6.7p1-5+deb8u3_i386.deb |
Debian | 8 | arm64 | openssh-sftp-server | < 6.7p1-5+deb8u3 | openssh-sftp-server_6.7p1-5+deb8u3_arm64.deb |
Debian | 8 | amd64 | openssh-server | < 6.7p1-5+deb8u3 | openssh-server_6.7p1-5+deb8u3_amd64.deb |
Debian | 7 | all | openssh | < 1:6.0p1-4+deb7u5 | openssh_1:6.0p1-4+deb7u5_all.deb |
Debian | 8 | s390x | openssh-server | < 6.7p1-5+deb8u3 | openssh-server_6.7p1-5+deb8u3_s390x.deb |
Debian | 8 | ppc64el | openssh-client | < 6.7p1-5+deb8u3 | openssh-client_6.7p1-5+deb8u3_ppc64el.deb |
Debian | 8 | armel | openssh-server-udeb | < 6.7p1-5+deb8u3 | openssh-server-udeb_6.7p1-5+deb8u3_armel.deb |
Debian | 7 | armel | openssh-client-udeb | < 6.0p1-4+deb7u5 | openssh-client-udeb_6.0p1-4+deb7u5_armel.deb |
Debian | 8 | kfreebsd-i386 | openssh-sftp-server | < 6.7p1-5+deb8u3 | openssh-sftp-server_6.7p1-5+deb8u3_kfreebsd-i386.deb |
Debian | 7 | all | ssh | < 6.0p1-4+deb7u5 | ssh_6.0p1-4+deb7u5_all.deb |