| Package | Affected versions | Patched versions |
|---|---|---|
| asterisk | = 1.2.0_beta1= 1.2.0_beta2= 1.2.10= 1.2.11= 1.2.12= 1.2.13= 1.2.14= 1.2.15= 1.2.16= 1.2.17= 1.4.1= 1.4.2= 1.4_beta |
The SIP channel driver (chan_sip) in Asterisk before 1.2.18 and 1.4.x before 1.4.3 does not properly parse SIP UDP packets that do not contain a valid response code, which allows remote attackers to cause a denial of service (crash).
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