CVE-2011-2536 describes an information disclosure vulnerability in the SIP channel driver (chan_sip.c) of Asterisk Open Source versions 1.4.x, 1.6.2.x, and 1.8.x, as well as Asterisk Business Edition C.3.x. The flaw allows remote attackers to enumerate valid SIP account names by observing differing responses to invalid SIP requests, even when the 'alwaysauthreject' option is enabled. This vulnerability has a CVSS v2 score of 5.0 (Medium), indicating a network-based attack with low complexity, requiring no authentication, and resulting in partial confidentiality impact (information disclosure) without affecting integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.8.0CPE matchmatch criteria | cpe:2.3:a:digium:asterisk:1.8.0:*:*:*:*:*:*:* | ||
1.8.0CPE matchmatch criteria | cpe:2.3:a:digium:asterisk:1.8.0:beta1:*:*:*:*:*:* | ||
1.8.0CPE matchmatch criteria | cpe:2.3:a:digium:asterisk:1.8.0:beta2:*:*:*:*:*:* | ||
1.8.0CPE matchmatch criteria | cpe:2.3:a:digium:asterisk:1.8.0:beta3:*:*:*:*:*:* | ||
1.8.0CPE matchmatch criteria | cpe:2.3:a:digium:asterisk:1.8.0:beta4:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.