chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests.
Metrics
No CVSS v4.0
No CVSS v3.1
No CVSS v3.0
Access Vector Network
Access 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
This CVE is not in the KEV list.
Key SSVC decision points have not yet been added.
Affected Vendors & Products
Vendors | Products |
---|---|
Digium |
|
Configuration 1 [-]
|
Configuration 2 [-]
|
Configuration 3 [-]
|
Configuration 4 [-]
|
No data.
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2011-07-06T19:00:00
Updated: 2024-08-06T23:08:22.022Z
Reserved: 2011-06-27T00:00:00
Link: CVE-2011-2536
Vulnrichment
No data.
NVD
Status : Modified
Published: 2011-07-06T19:55:03.543
Modified: 2024-11-21T01:28:29.493
Link: CVE-2011-2536
Redhat
No data.