CVE-2011-4597
Medium
Description
The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.
SeverityMedium
CVSS5.0
Exploit probability—
ProductDigium Asterisk
PublishedDec 15, 2011
First seenDec 15, 2011
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| digium asterisk | 1.8.0, 1.8.1, 1.8.1.1, 1.8.1.2, 1.8.2, 1.8.2.1, 1.8.2.2, 1.8.2.3, 1.8.2.4, 1.8.3, 1.8.3.1, 1.8.3.2, 1.8.3.3, 1.8.4, 1.8.4.1, 1.8.4.2, 1.8.4.3, 1.8.4.4, 1.8.5, 1.8.5.0, 1.8.6.0, 1.8.7.0, 1.8.7.1, 1.6.2.0, 1.6.2.1, 1.6.2.2, 1.6.2.3, 1.6.2.4, 1.6.2.5, 1.6.2.6, 1.6.2.15, 1.6.2.16, 1.6.2.16.1, 1.6.2.16.2, 1.6.2.17, 1.6.2.17.1, 1.6.2.17.2, 1.6.2.17.3, 1.6.2.18, 1.6.2.19, 1.6.2.20, 1.6.2.21, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.4.5, 1.4.6, 1.4.7, 1.4.7.1, 1.4.8, 1.4.9, 1.4.10, 1.4.10.1, 1.4.11, 1.4.12, 1.4.12.1, 1.4.13, 1.4.14, 1.4.15, 1.4.16, 1.4.16.1, 1.4.16.2, 1.4.17, 1.4.18, 1.4.19, 1.4.19.1, 1.4.19.2, 1.4.20, 1.4.20.1, 1.4.21, 1.4.21.1, 1.4.21.2, 1.4.22, 1.4.22.1, 1.4.22.2, 1.4.23, 1.4.23.1, 1.4.23.2, 1.4.24, 1.4.24.1, 1.4.25, 1.4.25.1, 1.4.26, 1.4.26.1, 1.4.26.2, 1.4.26.3, 1.4.27, 1.4.27.1, 1.4.28, 1.4.29, 1.4.29.1, 1.4.30, 1.4.31, 1.4.32, 1.4.33, 1.4.33.1, 1.4.34, 1.4.35, 1.4.36, 1.4.37, 1.4.38, 1.4.39, 1.4.39.1, 1.4.39.2, 1.4.40, 1.4.40.1 | — |
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