CVE-2008-0871

Now SMS/MMS Gateway < 2007.06.27 - Stack-Based Buffer Overflow via HTTP Authorization Header or SMPP Packet

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2008-0871. PoCs published by Metasploit, Heretic2, MC, including Metasploit module exploits/windows/http/nowsms.

AI-analyzed exploit summary This Metasploit module exploits a stack buffer overflow in Now SMS/MMS Gateway v2007.06.27 via a crafted GET request with a malicious Authorization header. It achieves remote code execution by leveraging a CALL ESP instruction in SMSHMAC.DLL.

Description

Multiple stack-based buffer overflows in Now SMS/MMS Gateway 2007.06.27 and earlier allow remote attackers to execute arbitrary code via a (1) long password in an Authorization header to the HTTP service or a (2) large packet to the SMPP service.

Exploits (3)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16779

This Metasploit module exploits a stack buffer overflow in Now SMS/MMS Gateway v2007.06.27 via a crafted GET request with a malicious Authorization header. It achieves remote code execution by leveraging a CALL ESP instruction in SMSHMAC.DLL.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Now SMS/MMS Gateway v2007.06.27
No auth needed
Prerequisites: Network access to the target's HTTP service on port 8800
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Heretic2 · c++remotewindows
https://www.exploit-db.com/exploits/5695

This exploit targets a buffer overflow vulnerability in Now SMS/MMS Gateway v5.5, leveraging an egghunter and shellcode to achieve remote code execution. It includes both bind and reverse shell payloads.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Now SMS/MMS Gateway v5.5
No auth needed
Prerequisites: Network access to the target server · Vulnerable version of Now SMS/MMS Gateway
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC GOOD
by MC · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/nowsms.rb

This Metasploit module exploits a stack buffer overflow in Now SMS/MMS Gateway v2007.06.27 via a crafted GET request with a malicious Authorization header. It achieves remote code execution by leveraging a CALL ESP instruction in SMSHMAC.DLL.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Now SMS/MMS Gateway v2007.06.27
No auth needed
Prerequisites: Network access to the target on port 8800 · Target running vulnerable version of Now SMS/MMS Gateway
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2008/0615
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/27896
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/29003
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/488365/100/100/threaded
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/5695

Scores

EPSS 0.7704
EPSS Percentile 99.0%

Details

CWE
CWE-119
Status published
Products (1)
now/sms_mms_gateway < 2007.06.27
Published Feb 21, 2008
Tracked Since Feb 18, 2026