Vulnerabilities > CVE-2012-2252 - Remote Arbitrary Command Execution vulnerability in rssh Command Line Filtering
Attack vector
LOCAL Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Incomplete blacklist vulnerability in rssh before 2.3.4, when the rsync protocol is enabled, allows local users to bypass intended restricted shell access via the --rsh command line option. Per: http://cwe.mitre.org/data/definitions/184.html 'CWE-184: Incomplete Blacklist'
Vulnerable Configurations
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-2578.NASL description James Clawson discovered that rssh, a restricted shell for OpenSSH to be used with scp, sftp, rdist and cvs, was not correctly filtering command line options. This could be used to force the execution of a remote script and thus allow arbitrary command execution. Two CVE were assigned : - CVE-2012-2251 Incorrect filtering of command line when using rsync protocol. It was for example possible to pass dangerous options after a last seen 2020-03-17 modified 2012-11-28 plugin id 63068 published 2012-11-28 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/63068 title Debian DSA-2578-1 : rssh - insufficient filtering of rsync command line code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-2578. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(63068); script_version("1.10"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2012-2251", "CVE-2012-2252"); script_xref(name:"DSA", value:"2578"); script_name(english:"Debian DSA-2578-1 : rssh - insufficient filtering of rsync command line"); script_summary(english:"Checks dpkg output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "James Clawson discovered that rssh, a restricted shell for OpenSSH to be used with scp, sftp, rdist and cvs, was not correctly filtering command line options. This could be used to force the execution of a remote script and thus allow arbitrary command execution. Two CVE were assigned : - CVE-2012-2251 Incorrect filtering of command line when using rsync protocol. It was for example possible to pass dangerous options after a '--' switch. The rsync protocol support has been added in a Debian (and Fedora/Red Hat) specific patch, so this vulnerability doesn't affect upstream. - CVE-2012-2252 Incorrect filtering of the '--rsh' option: the filter preventing usage of the'--rsh=' option would not prevent passing '--rsh'. This vulnerability affects upstream code." ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2012-2251" ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2012-2252" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/squeeze/rssh" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2012/dsa-2578" ); script_set_attribute( attribute:"solution", value: "Upgrade the rssh packages. For the stable distribution (squeeze), this problem has been fixed in version 2.3.2-13squeeze3." ); script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0"); script_set_attribute(attribute:"patch_publication_date", value:"2012/11/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2012/11/28"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Debian Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("debian_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian"); if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (deb_check(release:"6.0", prefix:"rssh", reference:"2.3.2-13squeeze3")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201311-19.NASL description The remote host is affected by the vulnerability described in GLSA-201311-19 (rssh: Access restriction bypass) Multiple command line parsing and validation vulnerabilities have been discovered in rssh. Please review the CVE identifiers referenced below for details. Impact : Multiple parsing and validation vulnerabilities can cause the restrictions set up by rssh to be bypassed. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 71121 published 2013-11-29 reporter This script is Copyright (C) 2013-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/71121 title GLSA-201311-19 : rssh: Access restriction bypass code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 201311-19. # # The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc. # and licensed under the Creative Commons - Attribution / Share Alike # license. See http://creativecommons.org/licenses/by-sa/3.0/ # include("compat.inc"); if (description) { script_id(71121); script_version("1.5"); script_cvs_date("Date: 2018/07/12 19:01:15"); script_cve_id("CVE-2012-2252", "CVE-2012-3478"); script_bugtraq_id(53430, 56708); script_xref(name:"GLSA", value:"201311-19"); script_name(english:"GLSA-201311-19 : rssh: Access restriction bypass"); script_summary(english:"Checks for updated package(s) in /var/db/pkg"); script_set_attribute( attribute:"synopsis", value: "The remote Gentoo host is missing one or more security-related patches." ); script_set_attribute( attribute:"description", value: "The remote host is affected by the vulnerability described in GLSA-201311-19 (rssh: Access restriction bypass) Multiple command line parsing and validation vulnerabilities have been discovered in rssh. Please review the CVE identifiers referenced below for details. Impact : Multiple parsing and validation vulnerabilities can cause the restrictions set up by rssh to be bypassed. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/201311-19" ); script_set_attribute( attribute:"solution", value: "All rssh users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=app-shells/rssh-2.3.4'" ); script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:rssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"patch_publication_date", value:"2013/11/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/11/29"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2018 Tenable Network Security, Inc."); script_family(english:"Gentoo Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("qpkg.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo"); if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (qpkg_check(package:"app-shells/rssh", unaffected:make_list("ge 2.3.4"), vulnerable:make_list("lt 2.3.4"))) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get()); else security_warning(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "rssh"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2012-20109.NASL description Update to 2.3.4 and fix CVE-2012-2251 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-12-20 plugin id 63308 published 2012-12-20 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/63308 title Fedora 17 : rssh-2.3.4-1.fc17 (2012-20109) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2012-20109. # include("compat.inc"); if (description) { script_id(63308); script_version("1.10"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2012-2251", "CVE-2012-2252", "CVE-2012-3478"); script_bugtraq_id(53430, 56708); script_xref(name:"FEDORA", value:"2012-20109"); script_name(english:"Fedora 17 : rssh-2.3.4-1.fc17 (2012-20109)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Update to 2.3.4 and fix CVE-2012-2251 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=820414" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=880174" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=880177" ); # https://lists.fedoraproject.org/pipermail/package-announce/2012-December/094905.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?4310fa5a" ); script_set_attribute(attribute:"solution", value:"Update the affected rssh package."); script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:rssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:17"); script_set_attribute(attribute:"patch_publication_date", value:"2012/12/11"); script_set_attribute(attribute:"plugin_publication_date", value:"2012/12/20"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^17([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 17.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC17", reference:"rssh-2.3.4-1.fc17")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "rssh"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2012-20111.NASL description Update to 2.3.4 and fix CVE-2012-2251 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2013-01-14 plugin id 63489 published 2013-01-14 reporter This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/63489 title Fedora 18 : rssh-2.3.4-1.fc18 (2012-20111) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2012-20111. # include("compat.inc"); if (description) { script_id(63489); script_version("1.9"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2012-2251", "CVE-2012-2252", "CVE-2012-3478"); script_bugtraq_id(53430, 56708); script_xref(name:"FEDORA", value:"2012-20111"); script_name(english:"Fedora 18 : rssh-2.3.4-1.fc18 (2012-20111)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Update to 2.3.4 and fix CVE-2012-2251 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=820414" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=880174" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=880177" ); # https://lists.fedoraproject.org/pipermail/package-announce/2013-January/096204.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?8c587926" ); script_set_attribute(attribute:"solution", value:"Update the affected rssh package."); script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:rssh"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:18"); script_set_attribute(attribute:"patch_publication_date", value:"2012/12/11"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/14"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^18([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 18.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC18", reference:"rssh-2.3.4-1.fc18")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "rssh"); }
Seebug
bulletinFamily | exploit |
description | BUGTRAQ ID: 56708 CVE(CAN) ID: CVE-2012-2252 rssh是配合OpenSSH使用的shell,仅允许scp、sftp。现在也支持rdist、rsync、cvs。 rssh 2.3.3-3在使用rsync时没有正确过滤 --rsh 选项,可导致远程攻击者利用此漏洞执行任意命令。 0 rssh 2.3.3 厂商补丁: rssh ---- 目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载: http://prdownloads.sourceforge.net/rssh/rssh-2.3.4.tar.gz?download |
id | SSV:60484 |
last seen | 2017-11-19 |
modified | 2012-11-30 |
published | 2012-11-30 |
reporter | Root |
title | rssh rsync --rsh 选项远程任意命令执行漏洞 |
References
- http://archives.neohapsis.com/archives/bugtraq/2012-11/0101.html
- http://osvdb.org/87926
- http://secunia.com/advisories/51307
- http://secunia.com/advisories/51343
- http://www.debian.org/security/2012/dsa-2578
- http://www.openwall.com/lists/oss-security/2012/11/27/15
- http://www.openwall.com/lists/oss-security/2012/11/28/2
- http://www.openwall.com/lists/oss-security/2012/11/28/3
- http://www.securityfocus.com/bid/56708
- https://bugzilla.redhat.com/show_bug.cgi?id=880177
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80335