-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SCO Security Advisory Subject: UnixWare 7.1.3 UnixWare 7.1.1 : Vulnerabilities in long-lived TCP connections / Rose attack Advisory number: SCOSA-2005.14 Issue date: 2005 February 07 Cross reference: sr890247 fz529384 erg712598 sr890286 fz529414 erg712605 ______________________________________________________________________________ 1. Problem Description TCP, when using a large Window Size, makes it easier for remote attackers to guess sequence numbers and cause a denial of service (connection loss) to persistent TCP connections by repeatedly injecting a TCP RST packet, especially in protocols that use long-lived connections, such as BGP. Reference : NISCC Vulnerability Advisory 236929 Reference : CERT Technical Cyber Security Alert TA04-111A The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0230 to this issue. 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- UnixWare 7.1.3 /etc/conf/pack.d/inet/Driver_atup.o /etc/conf/pack.d/inet/Driver_mp.o /etc/conf/pack.d/inet/space.c /usr/include/netinet/ip_var.h UnixWare 7.1.1 /etc/conf/pack.d/inet/Driver_atup.o /etc/conf/pack.d/inet/Driver_mp.o /etc/conf/pack.d/inet/space.c /usr/include/netinet/ip_var.h 3. Solution The proper solution is to install the latest packages. 4. UnixWare 7.1.3 4.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.14 4.2 Verification MD5 (erg712598.pkg.Z) = c037e34427caf7f752eac2680f7dd29a md5 is available for download from ftp://ftp.sco.com/pub/security/tools 4.3 Installing Fixed Binaries Upgrade the affected binaries with the following sequence: Download erg712598.pkg.Z to the /var/spool/pkg directory # uncompress /var/spool/pkg/erg712598.pkg.Z # pkgadd -d /var/spool/pkg/erg712598.pkg 5. UnixWare 7.1.1 5.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.14 5.2 Verification MD5 (erg712598.711.pkg.Z) = 010281cae30aec75daa9b03b1ebbb522 md5 is available for download from ftp://ftp.sco.com/pub/security/tools 5.3 Installing Fixed Binaries Upgrade the affected binaries with the following sequence: Download erg712598.711.pkg.Z to the /var/spool/pkg directory # uncompress /var/spool/pkg/erg712598.711.pkg.Z # pkgadd -d /var/spool/pkg/erg712598.711.pkg 6. References Specific references for this advisory: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0230 http://www.uniras.gov.uk/niscc/docs/al-20040420-00199.html?lang=en http://www.us-cert.gov/cas/techalerts/TA04-111A.html SCO security resources: http://www.sco.com/support/security/index.html SCO security advisories via email http://www.sco.com/support/forums/security.html This security fix closes SCO incidents sr890247 fz529384 erg712598 sr890286 fz529414 erg712605. 7. Disclaimer SCO is not responsible for the misuse of any of the information we provide on this website and/or through our security advisories. Our advisories are a service to our customers intended to promote secure installation and use of SCO products. 8. Acknowledgments SCO would like to thank NISCC, Steve Bellovin, Rob Thomas and Paul Watson, Cisco Systems Inc. and Juniper Networks Inc. ______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (SCO/UNIX_SVR5) iD8DBQFCBBLfaqoBO7ipriERAjQsAKChGoyGEXEATXFEfzcdJs9rRGJUHQCdEpyN XnnKtGQOwKRJqqQQyXEV+yk= =96m9 -----END PGP SIGNATURE-----
