59697 : Asterisk SIP REGISTER Response Username Enumeration Weakness
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Views This Week Views All Time Added to OSVDB Last Modified Modified (since 2008) Percent Complete
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Timeline

Disclosure Date
2009-11-04

Description

Asterisk contains a flaw that may allow an attacker to determine valid usernames. The issue is triggered when different responses are being sent using a valid or an invalid username in 'REGISTER' messages. This can be exploited to determine valid usernames by sending a specially crafted 'REGISTER' message. .

Classification

Location: Remote / Network Access
Impact: Loss of Confidentiality
Solution: Patch / RCS, Upgrade
Disclosure: Vendor Verified

Solution

Upgrade to version 1.2.35, 1.4.26.3, 1.6.0.17, 1.6.19 or higher, as it has been reported to fix this vulnerability. In addition, Digium has released a patch for some older versions.

Products

Digium, Inc.
Asterisk
1.2.x
1.2.35 (not affected)
1.4.x
1.4.26.3 (not affected)
1.6.0.x
1.6.0.17 (not affected)
1.6.1.x
1.6.1.9 (not affected)

References

Credit

  • Patrik Karlsson - patrikcqure.net - cqure.net

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2009-11-11 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_1 Integrity_impact_0 Availability_impact_0

Comments

No Comments.

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