Vulnerabilities > CVE-2012-5573 - Resource Management Errors vulnerability in Torproject TOR
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote attackers to cause a denial of service (memory consumption or excessive cell reception rate) or bypass intended flow-control restrictions via a RELAY_COMMAND_SENDME command.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2012-835.NASL description - Tear down the circuit when receiving an unexpected SENDME cell. Prevents circumvention of the network last seen 2020-06-05 modified 2014-06-13 plugin id 74828 published 2014-06-13 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/74828 title openSUSE Security Update : tor (openSUSE-SU-2012:1624-1) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from openSUSE Security Update openSUSE-2012-835. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(74828); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2012-5573"); script_name(english:"openSUSE Security Update : tor (openSUSE-SU-2012:1624-1)"); script_summary(english:"Check for the openSUSE-2012-835 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: " - Tear down the circuit when receiving an unexpected SENDME cell. Prevents circumvention of the network's flow control, exhaustion of network resources and possible denial-of-service attacks on entry nodes [bnc#791374] CVE-2012-5573, adding tor-0.2.2.39-SENDME-DOS.patch" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.novell.com/show_bug.cgi?id=791374" ); script_set_attribute( attribute:"see_also", value:"https://lists.opensuse.org/opensuse-updates/2012-12/msg00018.html" ); script_set_attribute(attribute:"solution", value:"Update the affected tor packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:tor"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:tor-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:tor-debugsource"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:12.2"); script_set_attribute(attribute:"patch_publication_date", value:"2012/11/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/13"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"SuSE Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu"); 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/SuSE/release"); if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE"); if (release !~ "^(SUSE12\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "12.2", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE12.2", reference:"tor-0.2.2.39-3.13.1") ) flag++; if ( rpm_check(release:"SUSE12.2", reference:"tor-debuginfo-0.2.2.39-3.13.1") ) flag++; if ( rpm_check(release:"SUSE12.2", reference:"tor-debugsource-0.2.2.39-3.13.1") ) 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, "tor / tor-debuginfo / tor-debugsource"); }
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201301-03.NASL description The remote host is affected by the vulnerability described in GLSA-201301-03 (Tor: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Tor. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could cause a Denial of Service condition or obtain sensitive information. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 63437 published 2013-01-09 reporter This script is Copyright (C) 2013-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/63437 title GLSA-201301-03 : Tor: Multiple vulnerabilities code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 201301-03. # # 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(63437); script_version("1.5"); script_cvs_date("Date: 2018/08/10 18:07:07"); script_cve_id("CVE-2012-3517", "CVE-2012-3518", "CVE-2012-3519", "CVE-2012-4419", "CVE-2012-4922", "CVE-2012-5573"); script_xref(name:"GLSA", value:"201301-03"); script_name(english:"GLSA-201301-03 : Tor: Multiple vulnerabilities"); 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-201301-03 (Tor: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Tor. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could cause a Denial of Service condition or obtain sensitive information. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/201301-03" ); script_set_attribute( attribute:"solution", value: "All Tor users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/tor-0.2.3.25'" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:tor"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"patch_publication_date", value:"2013/01/08"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/09"); 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:"net-misc/tor", unaffected:make_list("ge 0.2.3.25"), vulnerable:make_list("lt 0.2.3.25"))) 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, "Tor"); }
NASL family Fedora Local Security Checks NASL id FEDORA_2013-3773.NASL description Significant package cleanup, including : - remove dependency on fedora-usermgmt - merge tor-core, tor-systemd and torify into previously empty tor package - remove unnecessary /var/run/tor - disallow group read for /var/log/tor - use --defaults-torrc as recommended by upstream - increase LimitNOFILE in tor.service from 4096 to 32768 - torify subpackage should depend on torsocks not tsocks (#908569) Fix outstanding security issues, plus package cleanup torify subpackage should depend on torsocks not tsocks 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 2013-03-25 plugin id 65671 published 2013-03-25 reporter This script is Copyright (C) 2013-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/65671 title Fedora 17 : tor-0.2.3.25-1702.fc17 (2013-3773) 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 2013-3773. # include("compat.inc"); if (description) { script_id(65671); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2012-5573"); script_xref(name:"FEDORA", value:"2013-3773"); script_name(english:"Fedora 17 : tor-0.2.3.25-1702.fc17 (2013-3773)"); 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: "Significant package cleanup, including : - remove dependency on fedora-usermgmt - merge tor-core, tor-systemd and torify into previously empty tor package - remove unnecessary /var/run/tor - disallow group read for /var/log/tor - use --defaults-torrc as recommended by upstream - increase LimitNOFILE in tor.service from 4096 to 32768 - torify subpackage should depend on torsocks not tsocks (#908569) Fix outstanding security issues, plus package cleanup torify subpackage should depend on torsocks not tsocks 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=880310" ); # https://lists.fedoraproject.org/pipermail/package-announce/2013-March/100940.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?19d872d6" ); script_set_attribute(attribute:"solution", value:"Update the affected tor package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:tor"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:17"); script_set_attribute(attribute:"patch_publication_date", value:"2013/03/12"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/03/25"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc."); 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:"tor-0.2.3.25-1702.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, "tor"); }
NASL family Mandriva Local Security Checks NASL id MANDRIVA_MDVSA-2013-132.NASL description Updated tor package fixes security vulnerabilities : Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoing OR connection, which allows remote relays to bypass intended anonymity properties by reading this chain and then determining the set of entry guards that the client or bridge had selected (CVE-2011-2768). Tor before 0.2.2.34, when configured as a bridge, accepts the CREATE and CREATE_FAST values in the Command field of a cell within an OR connection that it initiated, which allows remote relays to enumerate bridges by using these values (CVE-2011-2769). Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests (CVE-2012-3517). The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly handle an invalid flavor name, which allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted (1) vote document or (2) consensus document (CVE-2012-3518). routerlist.c in Tor before 0.2.2.38 uses a different amount of time for relay-list iteration depending on which relay is chosen, which might allow remote attackers to obtain sensitive information about relay selection via a timing side-channel attack (CVE-2012-3519). The compare_tor_addr_to_addr_policy function in or/policies.c in Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.21-rc, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a zero-valued port field that is not properly handled during policy comparison (CVE-2012-4419). Tor before 0.2.2.39, when waiting for a client to renegotiate, allowed it to add bytes to the input buffer, allowing a crash to be caused remotely (tor-5934, tor-6007). Denial of Service vulnerability in Tor before 0.2.3.25, due to an error when handling SENDME cells and can be exploited to cause excessive consumption of memory resources within an entry node (SA51329, CVE-2012-5573). The version of Tor shipped in MBS1 did not have correctly formed systemd unit and thus failed to start. This updated version corrects this problem and restores working behaviour. last seen 2020-06-01 modified 2020-06-02 plugin id 66144 published 2013-04-20 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/66144 title Mandriva Linux Security Advisory : tor (MDVSA-2013:132) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Mandriva Linux Security Advisory MDVSA-2013:132. # The text itself is copyright (C) Mandriva S.A. # include("compat.inc"); if (description) { script_id(66144); script_version("1.7"); script_cvs_date("Date: 2019/08/02 13:32:55"); script_cve_id("CVE-2011-2768", "CVE-2011-2769", "CVE-2012-3517", "CVE-2012-3518", "CVE-2012-3519", "CVE-2012-4419", "CVE-2012-5573"); script_bugtraq_id(50414, 55128, 55519, 56675); script_xref(name:"MDVSA", value:"2013:132"); script_xref(name:"MGASA", value:"2012-0276"); script_xref(name:"MGASA", value:"2012-0356"); script_name(english:"Mandriva Linux Security Advisory : tor (MDVSA-2013:132)"); script_summary(english:"Checks rpm output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Mandriva Linux host is missing a security update." ); script_set_attribute( attribute:"description", value: "Updated tor package fixes security vulnerabilities : Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoing OR connection, which allows remote relays to bypass intended anonymity properties by reading this chain and then determining the set of entry guards that the client or bridge had selected (CVE-2011-2768). Tor before 0.2.2.34, when configured as a bridge, accepts the CREATE and CREATE_FAST values in the Command field of a cell within an OR connection that it initiated, which allows remote relays to enumerate bridges by using these values (CVE-2011-2769). Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might allow remote attackers to cause a denial of service (daemon crash) via vectors related to failed DNS requests (CVE-2012-3517). The networkstatus_parse_vote_from_string function in routerparse.c in Tor before 0.2.2.38 does not properly handle an invalid flavor name, which allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted (1) vote document or (2) consensus document (CVE-2012-3518). routerlist.c in Tor before 0.2.2.38 uses a different amount of time for relay-list iteration depending on which relay is chosen, which might allow remote attackers to obtain sensitive information about relay selection via a timing side-channel attack (CVE-2012-3519). The compare_tor_addr_to_addr_policy function in or/policies.c in Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.21-rc, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a zero-valued port field that is not properly handled during policy comparison (CVE-2012-4419). Tor before 0.2.2.39, when waiting for a client to renegotiate, allowed it to add bytes to the input buffer, allowing a crash to be caused remotely (tor-5934, tor-6007). Denial of Service vulnerability in Tor before 0.2.3.25, due to an error when handling SENDME cells and can be exploited to cause excessive consumption of memory resources within an entry node (SA51329, CVE-2012-5573). The version of Tor shipped in MBS1 did not have correctly formed systemd unit and thus failed to start. This updated version corrects this problem and restores working behaviour." ); script_set_attribute( attribute:"see_also", value:"https://wiki.mageia.org/en/Support/Advisories/MGAA-2012-0184" ); script_set_attribute(attribute:"solution", value:"Update the affected tor package."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N"); 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:mandriva:linux:tor"); script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:1"); script_set_attribute(attribute:"patch_publication_date", value:"2013/04/10"); script_set_attribute(attribute:"plugin_publication_date", value:"2013/04/20"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Mandriva Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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); if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux"); if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu); flag = 0; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"tor-0.2.2.39-1.mbs1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family Fedora Local Security Checks NASL id FEDORA_2013-3434.NASL description Update for security and massive revamp of spec Fix outstanding security issues, plus package cleanup torify subpackage should depend on torsocks not tsocks 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 2013-03-17 plugin id 65591 published 2013-03-17 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/65591 title Fedora 18 : tor-0.2.3.25-1802.fc18 (2013-3434)
References
- http://openwall.com/lists/oss-security/2012/11/26/11
- http://secunia.com/advisories/51329
- http://security.gentoo.org/glsa/glsa-201301-03.xml
- https://bugs.gentoo.org/show_bug.cgi?id=444804
- https://bugzilla.redhat.com/show_bug.cgi?id=880310
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80289
- https://gitweb.torproject.org/arma/tor.git/commitdiff/b9b54568c0bb64c32bd0b362954bdbc8c1234b16
- https://gitweb.torproject.org/tor.git/blob/release-0.2.3:/ReleaseNotes
- https://trac.torproject.org/projects/tor/ticket/6252