4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
0.01 Low
EPSS
Percentile
84.0%
channels/chan_sip.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x
before 10.5.2, Asterisk Business Edition C.3.x before C.3.7.5, Certified
Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones
10.x.x-digiumphones before 10.5.2-digiumphones does not properly handle a
provisional response to a SIP reINVITE request, which allows remote
authenticated users to cause a denial of service (RTP port exhaustion) via
sessions that lack final responses.