var-200310-0057
Vulnerability from variot
Check Point FireWall-1 4.0 and 4.1 before SP5 allows remote attackers to obtain the IP addresses of internal interfaces via certain SecuRemote requests to TCP ports 256 or 264, which leaks the IP addresses in a reply packet. An information leakage issue has been discovered in Check Point Firewall-1. Because of this, an attacker may gain sensitive information about network resources. Check Point FireWall-1 4.0 and 4.1 (prior to SP5) include SecuRemote which allows mobile users to connect to the internal network using encrypted and authenticated sessions. Connect to TCP port 256 of Firewall-1 version 4.0 and 4.1 via telnet, and enter the following characters: aa aa The IP address of the firewall will be returned in binary form. In addition, when using SecuRemote to connect to the TCP port 264 of the firewall, if you use a packet sniffer to intercept the data transmission, you can see the IP address information similar to the following: 15:45:44.029883 192.168.1.1.264 > 10.0.0.1.1038: P 5: 21(16) ack 17 win 8744 (DF) 0x0000 4500 0038 a250 4000 6e06 5b5a ca4d b102 E..8.P@.n.[ZM. 0x0010 5102 42c3 0108 040e 1769 fb25 cdc0....8a .i.\%...6 0x0020 5018 2228 fa32 0000 0000 000c c0a8 0101 P.\"(.2.......M.. 0x0030 c0a8 0a01 c0a8 0e01 ........ c0a8 0101 = 192.168.1.1 c0a8 0a01 = 192.168.10.1 c0a8 0e01 = 192.168.14.1
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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