34479 : Asterisk Malformed SIP INVITE Request DoS
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Info

Last Modified
about 1 year ago

Percent Complete
100%

Disclosure
Mar 21, 2007

Discovery
Unknown

Dates

Exploit
Mar 24, 2007

Solution
Unknown

Description

 Asterisk PBX contains a flaw that may allow a remote denial of service. The issue is triggered when a malformed SIP INVITE message containing two SDP headers is sent to the affected application. To exploit this issue, the first header must contain a valid IP address where the second must contain an invalid one. This will result in loss of availability for the asterisk service.

Classification

 Location: Remote / Network Access
Attack Type: Denial of Service
Impact: Loss of Availability
Exploit: Exploit Public
Disclosure: OSVDB Verified

Technical

 This vulnerability is only present if the SIP service accepts unauthenticated requests or proper authentication is provided.

Solution

 Upgrade to version 1.2.17 or 1.4.2 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products
Digium
Watch-list
Asterisk
Watch-list
 1.4.0
1.4.1
1.2.16
1.2.15
1.2.14
1.2.13 (not affected)
1.2.12 (not affected)
1.2.10 (not affected)
1.2.9 (not affected)
1.2.8 (not affected)
1.2.7 (not affected)
1.2.6 (not affected)
1.2.5 (not affected)
1.2.4 (not affected)
1.2.3 (not affected)
1.2.2 (not affected)
1.2.1 (not affected)
1.2.0 (not affected)

References

Tools & Filters
24934 25938 27157

Credit
  • Humberto J. Abdelnur -   -
  • Radu State -   -
  • Olivier Festor -   -

CVSSv2 Score

CVSSv2 Base Score = 7.8
Source: nvd.nist.gov | Generated: 2007-03-22 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_0 Integrity_impact_0 Availability_impact_2

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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