SB2016100801 - [ASA-201610-7] wpa_supplicant: multiple issues
Published: October 8, 2016
Security Bulletin ID
SB2016100801
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Denial of service (CVE-ID: CVE-2016-4476)
CWE-ID: CWE-88 - Argument Injection or Modification
CVSSv4: 5.8 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness is due to improper writing of configuration file update for the WPA/WPA2 passphrase parameter. If the parameter is updated through a WPS operation or local configuration, the resulting configuration file leads to interruption of the hostapd and wpa supplicant functionality.
Successful exploitation of the vulnerability results in denial of service on the vulnerable system.
2) Privilege Escalation (CVE-ID: CVE-2016-4477)
CWE-ID: CWE-88 - Argument Injection or Modification
CVSSv4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to gain elevated privileges on the target system.
The weakness exists due to access control error. Updating of the local configuration through the control interface
SET_NETWORK command lets attackers to run code from a localy strored library file under the same privileges as the wpa _supplicant process has.
Successful exploitation of the vulnerability results in privilege escalation on the vulnerable system.
Remediation
Install update from vendor's website.