Vulnerabilities > CVE-2008-5849 - Information Exposure vulnerability in Checkpoint Vpn-1 R55/R65

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
low complexity
checkpoint
CWE-200

Summary

Check Point VPN-1 R55, R65, and other versions, when Port Address Translation (PAT) is used, allows remote attackers to discover intranet IP addresses via a packet with a small TTL, which triggers an ICMP_TIMXCEED_INTRANS (aka ICMP time exceeded in-transit) response containing an encapsulated IP packet with an intranet address, as demonstrated by a TCP packet to the firewall management server on port 18264.

Vulnerable Configurations

Part Description Count
Application
Checkpoint
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Seebug

bulletinFamilyexploit
descriptionCVE(CAN) ID: CVE-2008-5849 CheckPoint防火墙/VPN解决方案可为组织提供网络架构和信息安全保护。 对于启用了端口地址翻译(PAT)的CheckPoint VPN-1防火墙,如果远程攻击者向防火墙的18264/tcp端口发送设置有很低TTL值的报文的话,就可以触发ICMP_TIMXCEED_INTRANS响应,而响应的封装IP报文中包含有内部IP地址,如下所示: 14:56:25.169480 IP (tos 0xe0, ttl 255, id 21407, offset 0, flags [none], proto: ICMP (1), length: 68) 193.0.0.1 &gt; 194.0.0.1: ICMP time exceeded in-transit, length 48 IP (tos 0x0, ttl 1, id 5120, offset 0, flags [none], proto: TCP (6), length: 40) 194.0.0.1.9003 &gt; 10.0.0.99.18264: S, cksum 0x03e6 (correct), 2834356043:2834356043(0) win 512 Check Point Software VPN-1 R65 Check Point Software VPN-1 R55 厂商补丁: Check Point Software -------------------- 目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载: <a href=http://downloads.checkpoint.com/dc/download.htm?ID=8606 target=_blank rel=external nofollow>http://downloads.checkpoint.com/dc/download.htm?ID=8606</a> <a href=http://downloads.checkpoint.com/dc/download.htm?ID=8607 target=_blank rel=external nofollow>http://downloads.checkpoint.com/dc/download.htm?ID=8607</a> <a href=http://downloads.checkpoint.com/dc/download.htm?ID=8608 target=_blank rel=external nofollow>http://downloads.checkpoint.com/dc/download.htm?ID=8608</a> <a href=http://downloads.checkpoint.com/dc/download.htm?ID=8609 target=_blank rel=external nofollow>http://downloads.checkpoint.com/dc/download.htm?ID=8609</a>
idSSV:4630
last seen2017-11-19
modified2009-01-07
published2009-01-07
reporterRoot
sourcehttps://www.seebug.org/vuldb/ssvid-4630
titleCheckpoint VPN-1 PAT信息泄露漏洞