CVE-2011-4597 describes a username enumeration vulnerability in the SIP over UDP implementation of Asterisk Open Source versions 1.4.x, 1.6.x, and 1.8.x. This flaw allows remote attackers to determine valid SIP usernames by observing differing port numbers in responses to invalid requests. With a CVSS score of 5.0 (medium severity), it has a low attack complexity and requires no authentication, potentially leading to information disclosure. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| 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.