Description
Heap-based buffer overflow in the SvrAppendReceivedChunk function in xlsasink.dll in the SMTP service of Exchange Server 2000 and 2003 allows remote attackers to execute arbitrary code via a crafted X-LINK2STATE extended verb request to the SMTP port.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Microsoft Exchange Server - Remote Code Execution (MS05-021) EDB-947 · remote · Apr 19, 2005 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- oval:org.mitre.oval:def:4032 vdb-entry signature
- MS05-021 vendor-advisory
- 14920 third-party-advisory
- VU#275193 third-party-advisory
- 15467 vdb-entry
- 20050412 Microsoft Exchange Remote Compromise third-party-advisory
- TA05-102A third-party-advisory
- 20050419 MS05-021 Microsoft Exchange X-LINK2STATE Heap Overflow PoC mailing-list