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medium4.3

CVE-2008-1897

The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x before 1.4.19.1; Business Edition A.x.x, B.x.x before B.2.5.2…

Impact

The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x before 1.4.19.1; Business Edition A.x.x, B.x.x before B.2.5.2, and C.x.x before C.1.8.1; AsteriskNOW before 1.0.3; Appliance Developer Kit 0.x.x; and s800i before 1.1.0.3, when configured to allow unauthenticated calls, does not verify that an ACK response contains a call number matching the server's reply to a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed ACK response that does not complete a 3-way handshake. NOTE: this issue exists because of an incomplete fix for CVE-2008-1923.

Affected products

VendorProductAffected versions
AsteriskAsterisk Appliance Developer Kit
Versions 0.2, 0.3, 0.4, 0.5, 0.6, 0.6.0
AsteriskAsterisk Business Edition
through b.2.5.1
through c1.8.0
Versions a, b.1.3.2, b.1.3.3, b.2.2.0
AsteriskAsterisknow
through 1.0.2
Versions 1.0, 1.0.1
AsteriskOpen Source
through 1.2.27
through 1.4.19
Versions 1.0, 1.0.0, 1.0.1, 1.0.2
AsteriskS800i
through 1.1.0.2
Versions 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.3.3

Weakness classification

CWE-287

References