__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN scponly Vulnerability [Debian Security Advisory DSA-1473-1] January 30, 2008 13:00 GMT Number S-142 ______________________________________________________________________________ PROBLEM: It was discovered that Subversion support in scponly is inherently insecure, allowing execution of arbitrary commands. PLATFORM: Debian GNU/Linux 3.1 (oldstable), 4.0 (stable) DAMAGE: Execution of arbitrary commands. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is LOW. May allow execution of arbitrary commands. ASSESSMENT: Further investigation showed that rsync and Unison support suffer from similar issues. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-142.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2008/dsa-1473 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2007-6350 CVE-2007-6415 ______________________________________________________________________________ [***** Start Debian Security Advisory DSA-1473-1 *****] Debian Security Advisory DSA-1473-1 scponly -- design flaw Date Reported: 21 Jan 2008 Affected Packages: scponly Vulnerable: Yes Security database references: In the Debian bugtracking system: Bug 437148. In Mitre's CVE dictionary: CVE-2007-6350, CVE-2007-6415. More information: Joachim Breitner discovered that Subversion support in scponly is inherently insecure, allowing execution of arbitrary commands. Further investigation showed that rsync and Unison support suffer from similar issues. This set of issues has been assigned CVE-2007-6350. In addition, it was discovered that it was possible to invoke scp with certain options that may lead to the execution of arbitrary commands (CVE-2007-6415). This update removes Subversion, rsync and Unison support from the scponly package, and prevents scp from being invoked with the dangerous options. For the old stable distribution (sarge), these problems have been fixed in version 4.0-1sarge2. For the stable distribution (etch), these problems have been fixed in version 4.6-1etch1. The unstable distribution (sid) will be fixed soon. We recommend that you upgrade your scponly package. Fixed in: Debian GNU/Linux 3.1 (oldstable) Source: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0.orig.tar.gz http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2.diff.gz http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2.dsc Alpha: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_alpha.deb AMD64: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_amd64.deb ARM: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_arm.deb HP Precision: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_hppa.deb Intel IA-32: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_ia64.deb Motorola 680x0: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_m68k.deb Big-endian MIPS: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_mips.deb Little-endian MIPS: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.0-1sarge2_sparc.deb Debian GNU/Linux 4.0 (stable) Source: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1.diff.gz http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1.dsc http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6.orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_alpha.deb AMD64: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_amd64.deb ARM: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_arm.deb HP Precision: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_hppa.deb Intel IA-32: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_ia64.deb Big-endian MIPS: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_mips.deb Little-endian MIPS: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/s/scponly/scponly_4.6-1etch1_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-1473-1 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian 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. 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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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