Buffer overflow in eStara Softphone 220.127.116.11 through 18.104.22.168 allows remote attackers to execute arbitrary code via a long attribute (aka "a") field in the SDP data of a SIP packet on UDP port 5060.
CVSS Severity (version 2.0):
Impact Subscore: 6.4
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Provides user account access, Allows partial confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service
This is the vendor provided solution:
"eStara has released Softphone version 22.214.171.124 to resolve the buffer overflow demonstrated in parsing SDP with long "a=" lines. Licensed customers can download a new version via the email sent to them with purchase, customers testing may go back to http://www.estara.com/softphone/ to obtain a new free trial. Version information can be gathered by going to Help->About. eStara highly recommends all customers upgrade to avoid this issue. If there's further questions please email us: email@example.com.
eStara would like to thank ZwelL for bringing the issue to our attention."
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20060111 eStara Softphone SIP stack Buffer Overflow Vulnerability
Vulnerable software and versions