SB2017082508 - Authentication bypass in Kerberos
Published: August 25, 2017 Updated: April 25, 2018
Security Bulletin ID
SB2017082508
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Authentication bypass (CVE-ID: CVE-2017-7562)
CWE-ID: CWE-592 - Authentication Bypass Issues
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote authenticated attacker to write arbitrary files on the target system.
The weakness exists due to an authentication bypass in the way krb5's certauth interface handled the validation of client certificates. A remote attacker can impersonate arbitrary principals under rare and erroneous circumstances.
Remediation
Install update from vendor's website.