5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.004 Low
EPSS
Percentile
73.3%
The default configuration of the SIP channel driver in Asterisk Open Source
1.4.x through 1.4.41.2 and 1.6.2.x through 1.6.2.18.2 does not enable the
alwaysauthreject option, which allows remote attackers to enumerate account
names by making a series of invalid SIP requests and observing the
differences in the responses for different usernames, a different
vulnerability than CVE-2011-2536.