-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Qpopper Buffer Overflow Vulnerability December 3, 1999 17:00 GMT Number K-009 _____________________________________________________________________________ PROBLEM: Some versions of Qpopper are exploitable to a buffer overflow vulnerability. PLATFORM: All platforms running any of the officially released versions Qpopper 2.41 and earlier, and those running the beta versions Qpopper 3.0b21 and older. DAMAGE: Remote users can exploit the vulnerability to obtain unauthorized root access. SOLUTION: Upgrade to the officially released version Qpopper 2.5 or later, or to the beta version Qpopper 3.0b22 or later. _____________________________________________________________________________ VULNERABILITY The risk is HIGH. Information about these vulnerabilities including exploit programs have been publicly distributed. _____________________________________________________________________________ CIAC has the following updated information to the AusCERT Alert given below: If you are using the beta release 3.0b21 or older, upgrade to release 3.0b22 or later. The official qpopper Frequently Asked Questions (FAQ) page at http://www.eudora.com/freeware/qpop_faq.html when last updated on 1 December 1999 stated that "Qpopper 2.41 and prior versions, and Qpopper 3.0b21 and older, are vulnerable to buffer overflow. Remote users can obtain root access on systems running these versions. Releases of Qpopper 2.5 and later, and 3.0b22 and later are immune from all known buffer overrun security holes posted in bugtraq. Please upgrade your server if you are running any Qpopper older than 2.5, or are running a 3.0 beta older than b22." The FAQ can be accessed through a link found in the official Qpopper home page at: http://www.eudora.com/freeware/qpop.html [Start AusCERT Alert] - -----BEGIN PGP SIGNED MESSAGE----- =========================================================================== A U S C E R T A L E R T AL-1999.005 -- AUSCERT ALERT Buffer overflow in qpopper 02 December 1999 =========================================================================== PROBLEM: The qpopper program is Unix server software that supports the POP3 protocol for downloading Internet e-mail using software clients. AusCERT has received information that some versions of qpopper are vulnerable to a remotely exploitable buffer overflow. Information regarding these vulnerabilities including exploit programs have been made publicly available. AusCERT expects that intruders will actively exploit this vulnerability. VERSIONS: All qpopper 3.0 beta releases 3.0b20 and older are susceptible to this vulnerability. qpopper versions prior to 2.41 are also vulnerable to an exploitable buffer overflow as described in a previously released AusCERT advisory (AA-98.01) available from: ftp://ftp.auscert.org.au/pub/auscert/advisory/AA- 98.01.qpopper.buffer.overflow.vul IMPACT: Vulnerable versions of qpopper may allow remote users to gain root access. SOLUTION: Sites running vulnerable versions of qpopper should upgrade to the current version. The latest official release of qpopper is 2.53. Sites using the 3.0 beta release should upgrade to the latest release which is version 3.0b21. For complete details and download instructions see the official qpopper home page at: http://www.eudora.com/freeware/qpop.html - - --------------------------------------------------------------------------- AusCERT acknowledges the posters to the Bugtraq mailing list and Qualcomm Support for information provided in this alert. AusCERT also thanks Joe Haskian of the University of Melbourne. - - --------------------------------------------------------------------------- [AusCERT issues an alert when the risk posed by a vulnerability that may not have been thoroughly investigated and for which a work-around or fix may not yet have been developed requires notification.] The AusCERT team has made every effort to ensure that the information contained in this document is accurate at the time of publication. However, the decision to use the information described is the responsibility of each user or organisation. The appropriateness of this document for an organisation or individual system should be considered before application in conjunction with local policies and procedures. AusCERT takes no responsibility for the consequences of applying the contents of this document. If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). AusCERT maintains an anonymous FTP service which is found on: ftp://ftp.auscert.org.au/pub/. This archive contains past SERT and AusCERT Advisories, and other computer security information. AusCERT maintains a World Wide Web service which is found on: http://www.auscert.org.au/. Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for emergencies. Postal: Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 AUSTRALIA =========================================================================== - -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOEfZMih9+71yA2DNAQE4JAP/ZkKsWC0Tb2VG/4Uk9v4g3BTr3ZYQVYJn u+HqJ++Aib0QfgCe6RRe8LlozddYFNZYYfFx82pjcofEEnD1FPO7XqHZ3t3/PlvB nUhXHVRm/obEhSw8TZUry6m1eS9qycE6Gjfp8jWz/wWKHaNvFcaw+X7+W13gjIfP kikFxZ4+lnw= =hTST - -----END PGP SIGNATURE----- [End AusCERT Alert] _____________________________________________________________________________ CIAC wishes to acknowledge the contributions of AUSCERT and Qualcomm 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 FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov For emergencies and off-hour assistance, DOE, DOE contractor sites, and the NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), use one of the following methods to contact CIAC: 1. Call the CIAC voice number 925-422-8193 and leave a message, or 2. Call 888-449-8369 to send a Sky Page to the CIAC duty person or 3. Send e-mail to 4498369@skytel.com, or 4. Call 800-201-9288 for the CIAC Project Leader. Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ (or http://ciac.llnl.gov -- they're the same machine) Anonymous FTP: ftp.ciac.org (or ciac.llnl.gov -- they're the same machine) Modem access: +1 (925) 423-4753 (28.8K baud) +1 (925) 423-3331 (28.8K baud) CIAC has several self-subscribing mailing lists for electronic publications: 1. CIAC-BULLETIN for Advisories, highest priority - time critical information and Bulletins, important computer security information; 2. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI) software updates, new features, distribution and availability; 3. SPI-NOTES, for discussion of problems and solutions regarding the use of SPI products. Our mailing lists are managed by a public domain software package called Majordomo, which ignores E-mail header subject lines. To subscribe (add yourself) to one of our mailing lists, send the following request as the E-mail message body, substituting ciac-bulletin, spi-announce OR spi-notes for list-name: E-mail to ciac-listproc@llnl.gov or majordomo@rumpole.llnl.gov: subscribe list-name e.g., subscribe ciac-bulletin You will receive an acknowledgment E-mail immediately with a confirmation that you will need to mail back to the addresses above, as per the instructions in the E-mail. This is a partial protection to make sure you are really the one who asked to be signed up for the list in question. If you include the word 'help' in the body of an E-mail to the above address, it will also send back an information file on how to subscribe/unsubscribe, get past issues of CIAC bulletins via E-mail, etc. 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. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) J-071: Buffer Overflow Vulnerability in amd J-072: IBM AIX Buffer Overflow Vulnerability K-001: Four Vulnerabilities in the Common Desktop Environment K-002: Microsoft IE 5 Vulnerability - "download behavior" K-003: Windows NT 4.0 does not delete Unattended Installation File K-004: Microsoft "Excel SYLK" Vulnerability K-005: Microsoft "Virtual Machine Verifier" Vulnerability K-006: Microsoft - Improve TCP Initial Sequence Number Randomness K-007: Multiple Vulnerabilities in BIND K-008: ExploreZip (packed) Worm - Addition to CIAC Bulletin J-047 -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBOEhRTbnzJzdsy3QZAQFO4AP/cJMN2m6yev9/xemz7WtTXh+cOXFMfl9D 3MtpEnGQz/YbLFBROb1hAKN+W2FoFdSqW8AsYN4qd61rurxZWpTsMzxMw0rkW6ow LnTH5gJa72pKQFR+xpZE1D7YZyHdh2RZ6l2RqXIkbhzvlkvFImAnWNdC3JTseZfO l0pmbB5BDiw= =KIix -----END PGP SIGNATURE-----