CVE-2016-6210 sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enum...
MediumCVSS 5.9
EPSS 88.9%
Public exploit
PoC
- Published
- Updated
- Exploit status
- Public exploit available
Description
sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/openssh(Debian:12) | < 1:7.2p2-6 | 1:7.2p2-6 |
| debian/openssh(Debian:13) | < 1:7.2p2-6 | 1:7.2p2-6 |
| debian/openssh(Debian:14) | < 1:7.2p2-6 | 1:7.2p2-6 |
| OpenBSD openssh | <= 7.2 | No fix listed |
| alpine/openssh(Alpine:v3.2) | < 6.8_p1-r7 | 6.8_p1-r7 |
| alpine/openssh(Alpine:v3.3) | < 7.2_p2-r1 | 7.2_p2-r1 |
| alpine/openssh(Alpine:v3.4) | < 7.2_p2-r1 | 7.2_p2-r1 |
References
- Debian Security Tracker CVE-2016-6210 vendor-advisory
- bugs.debian.org issue-tracking
- 20160714 opensshd - user enumeration mailing-list third-party-advisory
- DSA-3626 vendor-advisory
- 91812 third-party-advisory vdb-entry
- 1036319 vdb-entry
- RHSA-2017:2029 vendor-advisory
- RHSA-2017:2563 vendor-advisory
- cert-portal.siemens.com
- GLSA-201612-18 vendor-advisory
- security.netapp.com
- 40113 exploit
- 40136 exploit
- www.openssh.com release-notes vendor-advisory
- security.alpinelinux.org vendor-advisory