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-----BEGIN PGP SIGNED MESSAGE----- |
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Hash: SHA1 |
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GENTOO LINUX SECURITY ANNOUNCEMENT 200304-05 |
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|
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PACKAGE : snort |
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SUMMARY : Multiple Vulnerabilities in Snort Preprocessors |
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DATE : 2003-04-22 07:41 UTC |
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EXPLOIT : remote |
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VERSIONS AFFECTED : <snort-2.0.0 |
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FIXED VERSION : >=snort-2.0.0 |
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CVE : CAN-2003-0029 CAN-2003-0033 |
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- - From advisories: |
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|
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"The Sourcefire Vulnerability Research Team has learned of an integer overflow |
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in the Snort stream4 preprocessor used by the Sourcefire Network Sensor |
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product line. The Snort stream4 preprocessor (spp_stream4) incorrectly |
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calculates segment size parameters during stream reassembly for certain |
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sequence number ranges which can lead to an integer overflow that can be |
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expanded to a heap overflow. |
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|
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The Snort stream4 flaw may lead to a denial of service (DoS) attack or |
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remote command execution on a host running Snort. This attack can be launched |
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by crafting TCP stream packets and transmitting them over a network segment |
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that is being monitored by a vulnerable Snort implementation. In its |
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default configuration, certain versions of snort are vulnerable to this |
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attack, as is the default configuration of the Snort IDS." |
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|
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"Remote attackers may exploit the buffer overflow condition to run |
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arbitrary code on a Snort sensor with the privileges of the Snort IDS |
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process, which typically runs as the superuser. The vulnerable |
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preprocessor is enabled by default. It is not necessary to establish an |
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actual connection to a RPC portmapper service to exploit this |
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vulnerability." |
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|
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Read the full advisories at: |
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http://www.coresecurity.com/common/showdoc.php?idx=313&idxseccion=10 |
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http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21951 |
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http://www.snort.org/advisories/snort-2003-04-16-1.txt |
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|
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SOLUTION |
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|
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It is recommended that all Gentoo Linux users who are running |
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net-analyzer/snort upgrade to snort-2.0.0 as follows: |
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|
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emerge sync |
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emerge snort |
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emerge clean |
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|
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aliz@g.o - GnuPG key is available at http://cvs.gentoo.org/~aliz |
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