Vulnerability Details : CVE-2011-2536

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.
Published 2011-07-06 19:55:04
Updated 2011-09-07 03:17:36
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Information leak

Products affected by CVE-2011-2536

Threat overview for CVE-2011-2536

Top countries where our scanners detected CVE-2011-2536
Top open port discovered on systems with this issue 80
IPs affected by CVE-2011-2536 160
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2011-2536!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2011-2536

EPSS FAQ
0.39%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2011-2536

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
 NIST

CWE ids for CVE-2011-2536

References for CVE-2011-2536

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