|发布时间 :2000-04-24 00:00:00|
|修订时间 :2008-09-10 15:04:10|
[原文]ZoneAlarm 2.1.10 and earlier does not filter UDP packets with a source port of 67, which allows remote attackers to bypass the firewall rules.
- CVSS (基础分值)
- CPE (受影响的平台与产品)
- OVAL (用于检测的技术细节)
(UNKNOWN) BUGTRAQ 20000420 ZoneAlarm
(UNKNOWN) BID 1137
(UNKNOWN) OSVDB 1294
|2000-04-24 00:00:00||2005-05-02 00:00:00|
Zone Labs, as of April 25 2000 is offering a Beta to correct this problem:
Zone Labs Support issued the following statement to the Bugtraq mailing list on 12 May 2000.
This is the company position on the Port 67 issue....
The port 67 vulnerability has been eliminated. The upgraded version of ZoneAlarm contains the fix and is available from
Previously, ZoneAlarm did not prevent TCP or UDP packets from entering the computer through port 67. Port 67 was deliberately left open to avoid instabilities encountered on Windows NT machines using DHCP.
We felt confident that this did not compromise your security or the security of our other users. ZoneAlarm, in addition to its firewall capabilities, provides protection against hackers through its unique application control feature. Our product only allows applications the user specifically approves to communicate via the Internet. Even if a port appears to be open for traffic from the outside, it is in fact closed to all unauthorized traffic. Therefore port 67 could not (and cannot) be co-opted unknowingly into communicating your private information to a hacker via a Trojan horse. Our two measures of security taken together provide the utmost protection for our users.
Best regards Zone Labs Support
- 漏洞信息 (19871)
|Zone Labs ZoneAlarm 2.1 Personal Firewall Port 67 Vulnerability (EDBID:19871)|
source: http://www.securityfocus.com/bid/1137/info Certain versions of Zone Labs personal Firewall have a vulnerability which allows malicious users to port scan the firewall without being detected. In particular if the port scan originates from source port 67 on the attacking host the ZoneAlarm fails to register the attack. nmap -g67 -P0 -p130-140 -sU <targethost>
|ZoneAlarm Personal Firewall UDP Source Port 67 Bypass|
|Remote / Network Access||Input Manipulation, Misconfiguration|
|Loss of Confidentiality||Upgrade|
|ZoneAlarm contains a flaw that may allow a remote attacker to bypass the ruleset. The issue is due to ZoneAlarm not monitoring and alerting UDP traffic with a source port of 67. This allows an attacker to bypass the firewall to reach protected hosts without setting off warnings on the firewall.|
|Upgrade to version 2.1.25 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.|