99778 2003-04-28 18:01 /67 rader/ Daniel Ahlberg <aliz@gentoo.org>
Importerad: 2003-04-28 18:01 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Mottagare: Bugtraq (import) <4660>
Ärende: GLSA: snort (200304-06)
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GENTOO LINUX SECURITY ANNOUNCEMENT 200304-06
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PACKAGE : snort
SUMMARY : Multiple Vulnerabilities in Snort Preprocessors
DATE : 2003-04-28 07:07 UTC
EXPLOIT : remote
VERSIONS AFFECTED : <snort-2.0.0
FIXED VERSION : >=snort-2.0.0
CVE : CAN-2003-0209 CAN-2003-0033
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New (and correct) ID and updated CVE link.
- - From advisories:
"The Sourcefire Vulnerability Research Team has learned of an integer
overflow in the Snort stream4 preprocessor used by the Sourcefire
Network Sensor product line. The Snort stream4 preprocessor
(spp_stream4) incorrectly calculates segment size parameters during
stream reassembly for certain sequence number ranges which can lead
to an integer overflow that can be expanded to a heap overflow.
The Snort stream4 flaw may lead to a denial of service (DoS) attack
or remote command execution on a host running Snort. This attack can
be launched by crafting TCP stream packets and transmitting them over
a network segment that is being monitored by a vulnerable Snort
implementation. In its default configuration, certain versions of
snort are vulnerable to this attack, as is the default configuration
of the Snort IDS."
"Remote attackers may exploit the buffer overflow condition to run
arbitrary code on a Snort sensor with the privileges of the Snort IDS
process, which typically runs as the superuser. The vulnerable
preprocessor is enabled by default. It is not necessary to establish
an actual connection to a RPC portmapper service to exploit this
vulnerability."
Read the full advisories at:
http://www.coresecurity.com/common/showdoc.php?idx=313&idxseccion=10
http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21951
http://www.snort.org/advisories/snort-2003-04-16-1.txt
SOLUTION
It is recommended that all Gentoo Linux users who are running
net-analyzer/snort upgrade to snort-2.0.0 as follows:
emerge sync
emerge snort
emerge clean
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aliz@gentoo.org - GnuPG key is available at http://cvs.gentoo.org/~aliz
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(99778) /Daniel Ahlberg <aliz@gentoo.org>/(Ombruten)