Credentials management in OpenSSH - CVE-2012-0814
Published: January 27, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU44349
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2012-0814
CWE-ID: CWE-255
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenSSH
Affected software:
OpenSSH
OpenSSH
Detailed vulnerability description
The vulnerability allows a remote #AU# to gain access to sensitive information.
The auth_parse_options function in auth-options.c in sshd in OpenSSH before 5.7 provides debug messages containing authorized_keys command options, which allows remote authenticated users to obtain potentially sensitive information by reading these messages, as demonstrated by the shared user account required by Gitolite. NOTE: this can cross privilege boundaries because a user account may intentionally have no shell or filesystem access, and therefore may have no supported way to read an authorized_keys file in its own home directory.
How to mitigate CVE-2012-0814
Install update from vendor's website.
Sources
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=657445
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10673
- http://openwall.com/lists/oss-security/2012/01/26/15
- http://openwall.com/lists/oss-security/2012/01/26/16
- http://openwall.com/lists/oss-security/2012/01/27/1
- http://openwall.com/lists/oss-security/2012/01/27/4
- http://osvdb.org/78706
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth-options.c
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth-options.c.diff?r1=1.53;r2=1.54
- http://www.securityfocus.com/bid/51702
- https://exchange.xforce.ibmcloud.com/vulnerabilities/72756