File: 272.txt

package info (click to toggle)
snort 2.7.0-20.4
  • links: PTS
  • area: main
  • in suites: lenny
  • size: 34,512 kB
  • ctags: 18,772
  • sloc: ansic: 115,404; sh: 10,893; makefile: 1,372; perl: 487; sql: 213
file content (64 lines) | stat: -rw-r--r-- 1,409 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Rule:

--
Sid:
272

--
Summary:
This event is generated when a remote attacker transmits fragmented IGMP packets with malformed headers to the internal network, indicating an IGMP Denial of Service (DoS) attack.

--
Impact:
Denial of service.

--
Detailed Information:
If an IGMP packet with a malformed header is transmitted to an unpatched Microsoft Windows computer, the computer may crash when it attempts to process the packet.  

--
Affected Systems:
Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows 98 SE
Microsoft Windows NT 4

--
Attack Scenarios:
An attacker sends fragmented IGMP packets with malformed headers to a target computer. If the computer is running an unpatched version of Windows, it may crash.

--
Ease of Attack:
Simple. Exploits exist.

--
False Positives:
None known.

--
False Negatives:
None known.

--
Corrective Action:
Install the latest patches available for your operating system. See http://www.microsoft.com/technet/security/bulletin/ms99-034.asp for more information.

Implement a packet-filtering firewall to block inappropriate traffic to the network.

--
Contributors:
Original rule writer unknown
Sourcefire Research Team
Sourcefire Technical Publications Team
Jen Harvey <jennifer.harvey@sourcefire.com>

--
Additional References:

Bugtraq
http://www.securityfocus.com/bid/514

Microsoft
http://www.microsoft.com/technet/security/bulletin/ms99-034.asp

--