__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Ethereal 0.10.12 Released [Ethereal Document ID: enpa-sa-00020] July 27, 2005 17:00 GMT Number P-260 ______________________________________________________________________________ PROBLEM: Several security issues have been addressed in the 0.10.12 release of Ethereal. Ethereal is a widely used open source network protocol analyzer. PLATFORM: Ethereal versions 0.8.5 up to and including 0.10.11 DAMAGE: It may be possible to make Ethereal crash, use up available memory, or run arbitrary code by injecting a purposefully malformed packet onto the wire or by convincing someone to read a malformed packet trace file. SOLUTION: Apply the security updates. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. Exploiting the vulnerabilities may cause ASSESSMENT: Ethereal to crash, use up memory, or run arbitrary code by injecting a carefully crafted malformed packet onto the wire. Ethereal is typically invoked by the root user. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-260.shtml ORIGINAL BULLETIN: http://www.ethereal.com/appnotes/enpa-sa-00020.html ______________________________________________________________________________ [***** Start Ethereal Document ID: enpa-sa-00020 *****] Summary Name: Multiple problems in Ethereal versions 0.8.5 to 0.10.10 Docid: enpa-sa-00020 Date: July 26, 2005 Versions affected: 0.8.5 up to and including 0.10.11 Severity: High Details Description: Our testing program has turned up several more security issues: * The LDAP dissector could free static memory and crash. Versions affected: 0.8.5 to 0.10.11 * The AgentX dissector could crash. Versions affected: 0.10.10 to 0.10.11 * The 802.3 dissector could go into an infinite loop. Versions affected: 0.8.16 to 0.10.11 * The PER dissector could abort. Versions affected: 0.10.5 to 0.10.11 * The DHCP dissector could go into an infinite loop. Versions affected: 0.10.7 to 0.10.11 * The BER dissector could abort or loop infinitely. Version affected: 0.10.11 * The MEGACO dissector could go into an infinite loop. Versions affected: 0.9.14 to 0.10.11 * The GIOP dissector could dereference a null pointer. Versions affected: 0.8.20 to 0.10.11 * The SMB dissector was susceptible to a buffer overflow. Versions affected: 0.9.12 to 0.10.11 * The WBXML could dereference a null pointer. Versions affected: 0.10.1 to 0.10.11 * The H1 dissector could go into an infinite loop. Versions affected: 0.8.15 to 0.10.11 * The DOCSIS dissector could cause a crash. Versions affected: 0.9.13 to 0.10.11 * The SMPP dissector could go into an infinite loop. Versions affected: 0.10.1 to 0.10.11 * SCTP graphs could crash. Version affected: 0.10.11 * The HTTP dissector could crash. Versions affected: 0.10.4 to 0.10.11 * The SMB dissector could go into a large loop. Versions affected: 0.9.0 to 0.10.11 * The DCERPC dissector could crash. Versions affected: 0.9.16 to 0.10.11. * Several dissectors could crash while reassembling packets. Versions affected: 0.9.0 to 0.10.11 Steve Grubb at Red Hat found the following issues: * The CAMEL dissector could dereference a null pointer. Version affected: 0.10.11 * The DHCP dissector could crash. Versions affected: 0.10.4 to 0.10.11 * The CAMEL dissector could crash. Versions affected: 0.10.10 to 0.10.11 * The PER dissector could crash. Versions affected: 0.10.10 to 0.10.11 * The RADIUS dissector could crash. Versions affected: 0.9.4 to 0.10.11 * The Telnet dissector could crash. Versions affected: 0.9.10 to 0.10.11 * The IS-IS LSP dissector could crash. Versions affected: 0.8.19 to 0.10.11 * The NCP dissector could crash. Versions affected: 0.9.15 to 0.10.11 iDEFENSE found the following issues: * Several dissectors were susceptible to a format string overflow. Versions affected: 0.9.4 to 0.10.11 Ethereal uses the zlib compression library. Security vulnerabilities have been discovered in zlib 1.2.1 and 1.2.2. The Windows installer now ships with zlib 1.2.3, which fixes these vulnerabilities. Impact: It may be possible to make Ethereal crash, use up available memory, or run arbitrary code by injecting a purposefully malformed packet onto the wire or by convincing someone to read a malformed packet trace file. Resolution: Upgrade to 0.10.12. Due to the severity and scope of the defects that have been discovered, no workaround is available. [***** End Ethereal Document ID: enpa-sa-00020 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Ethereal for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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