Gentoo Archives: gentoo-announce

From: Daniel Ahlberg <aliz@g.o>
To: gentoo-announce@g.o
Subject: GLSA: snort (200304-06)
Date: Mon, 28 Apr 2003 08:53:51
Message-Id: 20030428070756.4B0BB338E6@mail1.tamperd.net
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5 GENTOO LINUX SECURITY ANNOUNCEMENT 200304-06
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7
8 PACKAGE : snort
9 SUMMARY : Multiple Vulnerabilities in Snort Preprocessors
10 DATE : 2003-04-28 07:07 UTC
11 EXPLOIT : remote
12 VERSIONS AFFECTED : <snort-2.0.0
13 FIXED VERSION : >=snort-2.0.0
14 CVE : CAN-2003-0209 CAN-2003-0033
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17
18 New (and correct) ID and updated CVE link.
19
20 - - From advisories:
21
22 "The Sourcefire Vulnerability Research Team has learned of an integer overflow
23 in the Snort stream4 preprocessor used by the Sourcefire Network Sensor
24 product line. The Snort stream4 preprocessor (spp_stream4) incorrectly
25 calculates segment size parameters during stream reassembly for certain
26 sequence number ranges which can lead to an integer overflow that can be
27 expanded to a heap overflow.
28
29 The Snort stream4 flaw may lead to a denial of service (DoS) attack or
30 remote command execution on a host running Snort. This attack can be launched
31 by crafting TCP stream packets and transmitting them over a network segment
32 that is being monitored by a vulnerable Snort implementation. In its
33 default configuration, certain versions of snort are vulnerable to this
34 attack, as is the default configuration of the Snort IDS."
35
36 "Remote attackers may exploit the buffer overflow condition to run
37 arbitrary code on a Snort sensor with the privileges of the Snort IDS
38 process, which typically runs as the superuser. The vulnerable
39 preprocessor is enabled by default. It is not necessary to establish an
40 actual connection to a RPC portmapper service to exploit this
41 vulnerability."
42
43 Read the full advisories at:
44 http://www.coresecurity.com/common/showdoc.php?idx=313&idxseccion=10
45 http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21951
46 http://www.snort.org/advisories/snort-2003-04-16-1.txt
47
48 SOLUTION
49
50 It is recommended that all Gentoo Linux users who are running
51 net-analyzer/snort upgrade to snort-2.0.0 as follows:
52
53 emerge sync
54 emerge snort
55 emerge clean
56
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58 aliz@g.o - GnuPG key is available at http://cvs.gentoo.org/~aliz
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