Vulnerabilities > CVE-2011-1924 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in TOR
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
Buffer overflow in the policy_summarize function in or/policies.c in Tor before 0.2.1.30 allows remote attackers to cause a denial of service (directory authority crash) via a crafted policy that triggers creation of a long port list.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2011-7972.NASL description - Thu Mar 17 2011 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.30-1400 - updated to 0.2.1.30 - Mon Jan 17 2011 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.29-1400 - updated to 0.2.1.29 (SECURITY) - CVE-2011-0427: heap overflow bug, potential remote code execution - Tue Dec 21 2010 Luke Macken <lmacken at redhat.com> - 0.2.1.28-1400 - updated to 0.2.1.28 (SECURITY: fixes a remotely exploitable heap overflow bug) - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.27-1400 - updated to 0.2.1.27 - work around broken chkconfig by adding dummy Default-Start: in -lsb (#647512) - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.26-1401 - fixed last seen 2020-06-01 modified 2020-06-02 plugin id 54981 published 2011-06-07 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/54981 title Fedora 14 : tor-0.2.1.30-1400.fc14 (2011-7972) 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 2011-7972. # include("compat.inc"); if (description) { script_id(54981); script_version("1.10"); script_cvs_date("Date: 2019/08/02 13:32:35"); script_cve_id("CVE-2011-1924"); script_bugtraq_id(46618); script_xref(name:"FEDORA", value:"2011-7972"); script_name(english:"Fedora 14 : tor-0.2.1.30-1400.fc14 (2011-7972)"); 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: " - Thu Mar 17 2011 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.30-1400 - updated to 0.2.1.30 - Mon Jan 17 2011 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.29-1400 - updated to 0.2.1.29 (SECURITY) - CVE-2011-0427: heap overflow bug, potential remote code execution - Tue Dec 21 2010 Luke Macken <lmacken at redhat.com> - 0.2.1.28-1400 - updated to 0.2.1.28 (SECURITY: fixes a remotely exploitable heap overflow bug) - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.27-1400 - updated to 0.2.1.27 - work around broken chkconfig by adding dummy Default-Start: in -lsb (#647512) - Fri Nov 26 2010 Enrico Scholz <enrico.scholz at informatik.tu-chemnitz.de> - 0.2.1.26-1401 - fixed 'limit' statement in upstart script 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=705194" ); # https://lists.fedoraproject.org/pipermail/package-announce/2011-June/061258.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?ee118a89" ); 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_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:tor"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:14"); script_set_attribute(attribute:"patch_publication_date", value:"2011/06/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/06/07"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2011-2019 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:"^14([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 14.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC14", reference:"tor-0.2.1.30-1400.fc14")) 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 Gentoo Local Security Checks NASL id GENTOO_GLSA-201110-13.NASL description The remote host is affected by the vulnerability described in GLSA-201110-13 (Tor: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Tor. Please review the CVE identifiers referenced below for details. Impact : A remote unauthenticated attacker may be able to execute arbitrary code with the privileges of the Tor process or create a Denial of Service. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 56549 published 2011-10-19 reporter This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/56549 title GLSA-201110-13 : Tor: Multiple vulnerabilities
References
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061258.html
- http://secunia.com/advisories/43548
- http://secunia.com/advisories/44862
- http://www.securityfocus.com/bid/46618
- https://bugzilla.redhat.com/show_bug.cgi?id=705192
- https://bugzilla.redhat.com/show_bug.cgi?id=705194
- https://gitweb.torproject.org/tor.git/commit/43414eb98821d3b5c6c65181d7545ce938f82c8e
- https://lists.torproject.org/pipermail/tor-announce/2011-February/000000.html