CVE-2006-0738

eStara Softphone < 3.0.1.47 - Denial of Service via SIP INVITE SDP Format String Specifiers

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2006-0738. PoCs published by ZwelL.

AI-analyzed exploit summary This exploit demonstrates a denial-of-service vulnerability in eStara Smartphone by sending malformed VOIP headers with format string specifiers (%s%x%n) in the SDP content. The malformed INVITE requests cause the device to crash when processing the headers.

Description

Multiple format string vulnerabilities in eStara SIP softphone allow remote attackers to cause a denial of service (hang) via SIP INVITE requests with format string specifiers in the SDP session description, as demonstrated using (1) the field name, (2) the o field (owner/creator and session identifier), or (3) the m field (media name and transport address).

Exploits (1)

exploitdb WORKING POC VERIFIED
by ZwelL · textdosmultiple
https://www.exploit-db.com/exploits/27210

This exploit demonstrates a denial-of-service vulnerability in eStara Smartphone by sending malformed VOIP headers with format string specifiers (%s%x%n) in the SDP content. The malformed INVITE requests cause the device to crash when processing the headers.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: eStara Smartphone (version not specified)
No auth needed
Prerequisites: Network access to the target device · Ability to send SIP INVITE requests to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/18872
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2006/0607
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/24678
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/16629
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/424943/100/0/threaded

Scores

EPSS 0.0312
EPSS Percentile 86.1%

Details

Status published
Products (1)
estara/softphone < 3.0.1.47
Published Feb 17, 2006
Tracked Since Feb 18, 2026