File: 111-5.txt

package info (click to toggle)
snort 2.9.7.0-5
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid, stretch
  • size: 55,000 kB
  • ctags: 38,464
  • sloc: ansic: 266,667; sh: 12,508; makefile: 2,908; yacc: 497; perl: 496; lex: 261; sed: 14
file content (61 lines) | stat: -rw-r--r-- 1,089 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
Rule: 

--
Sid: 
111-5

-- 
Summary: 
This event is generated when the pre-processor stream4
detects network traffic that may constitute an attack.

-- 
Impact: 
Unknown.

--
Detailed Information:
This event indicates that the pre-processor stream4 has detected a
packet with only the SYN flag set that contains a payload. A packet with
this flag set is meant to only set up a session between a client and
server. Any data in a packet of this kind indicates malicious activity
is taking place.

--
Affected Systems:
	All systems

--
Attack Scenarios: 
An attacker can attempt to evade an IDS by sending a malicious payload
in a packet designed to set up a session.

-- 
Ease of Attack: 
Moderate.

-- 
False Positives:
None Known.

--
False Negatives:
None Known.

-- 

Corrective Action:
Check the target host for signs of compromise.

Ensure the system is up to date with any appropriate vendor supplied patches.

--
Contributors:
Martin Roesch <roesch@sourcefire.com>
Sourcefire Vulnerability Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>

-- 
Additional References:

--