Vulnerabilities > CVE-2014-9462 - Improper Input Validation vulnerability in multiple products
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
The _validaterepo function in sshpeer in Mercurial before 3.2.4 allows remote attackers to execute arbitrary commands via a crafted repository name in a clone command.
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.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Nessus
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3257.NASL description Jesse Hertz of Matasano Security discovered that Mercurial, a distributed version control system, is prone to a command injection vulnerability via a crafted repository name in a clone command. last seen 2020-06-01 modified 2020-06-02 plugin id 83336 published 2015-05-12 reporter This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/83336 title Debian DSA-3257-1 : mercurial - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-3257. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(83336); script_version("2.3"); script_cvs_date("Date: 2018/11/10 11:49:37"); script_cve_id("CVE-2014-9462"); script_bugtraq_id(73688); script_xref(name:"DSA", value:"3257"); script_name(english:"Debian DSA-3257-1 : mercurial - security update"); 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: "Jesse Hertz of Matasano Security discovered that Mercurial, a distributed version control system, is prone to a command injection vulnerability via a crafted repository name in a clone command." ); script_set_attribute( attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=783237" ); script_set_attribute( attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2014-9390" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/wheezy/mercurial" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/mercurial" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2015/dsa-3257" ); script_set_attribute( attribute:"solution", value: "Upgrade the mercurial packages. For the oldstable distribution (wheezy), this problem has been fixed in version 2.2.2-4+deb7u1. This update also includes a fix for CVE-2014-9390 previously scheduled for the next wheezy point release. For the stable distribution (jessie), this problem has been fixed in version 3.1.2-2+deb8u1." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:ND/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:debian:debian_linux:mercurial"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"patch_publication_date", value:"2015/05/11"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/05/12"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2015-2018 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:"7.0", prefix:"mercurial", reference:"2.2.2-4+deb7u1")) flag++; if (deb_check(release:"7.0", prefix:"mercurial-common", reference:"2.2.2-4+deb7u1")) flag++; if (deb_check(release:"8.0", prefix:"mercurial", reference:"3.1.2-2+deb8u1")) flag++; if (deb_check(release:"8.0", prefix:"mercurial-common", reference:"3.1.2-2+deb8u1")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201612-19.NASL description The remote host is affected by the vulnerability described in GLSA-201612-19 (Mercurial: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Mercurial. Please review the CVE identifier and bug reports referenced for details. Impact : A remote attacker could possibly execute arbitrary code with the privileges of the process. Workaround : There is no known workaround at this time. last seen 2020-03-18 modified 2016-12-07 plugin id 95605 published 2016-12-07 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95605 title GLSA-201612-19 : Mercurial: 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 201612-19. # # The advisory text is Copyright (C) 2001-2020 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(95605); script_version("3.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/26"); script_cve_id("CVE-2014-9390", "CVE-2014-9462", "CVE-2016-3068", "CVE-2016-3069", "CVE-2016-3105", "CVE-2016-3630"); script_xref(name:"GLSA", value:"201612-19"); script_name(english:"GLSA-201612-19 : Mercurial: 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-201612-19 (Mercurial: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Mercurial. Please review the CVE identifier and bug reports referenced for details. Impact : A remote attacker could possibly execute arbitrary code with the privileges of the process. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/201612-19" ); script_set_attribute( attribute:"solution", value: "All mercurial users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=dev-vcs/mercurial-3.8.4'" ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Malicious Git and Mercurial HTTP Server For CVE-2014-9390'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:mercurial"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"vuln_publication_date", value:"2015/03/31"); script_set_attribute(attribute:"patch_publication_date", value:"2016/12/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/07"); script_set_attribute(attribute:"in_the_news", value:"true"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); 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:"dev-vcs/mercurial", unaffected:make_list("ge 3.8.4"), vulnerable:make_list("lt 3.8.4"))) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get()); else security_hole(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Mercurial"); }
NASL family SuSE Local Security Checks NASL id OPENSUSE-2015-268.NASL description mercurial was updated to fix a command Injection via sshpeer._validaterepo() (CVE-2014-9462, bnc#923070). last seen 2020-06-05 modified 2015-03-30 plugin id 82426 published 2015-03-30 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/82426 title openSUSE Security Update : mercurial (openSUSE-2015-268) 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-2015-268. # # The text description of this plugin is (C) SUSE LLC. # include("compat.inc"); if (description) { script_id(82426); script_version("1.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04"); script_cve_id("CVE-2014-9462"); script_name(english:"openSUSE Security Update : mercurial (openSUSE-2015-268)"); script_summary(english:"Check for the openSUSE-2015-268 patch"); script_set_attribute( attribute:"synopsis", value:"The remote openSUSE host is missing a security update." ); script_set_attribute( attribute:"description", value: "mercurial was updated to fix a command Injection via sshpeer._validaterepo() (CVE-2014-9462, bnc#923070)." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=923070" ); script_set_attribute( attribute:"solution", value:"Update the affected mercurial packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:novell:opensuse:mercurial"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:mercurial-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:mercurial-debugsource"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:mercurial-lang"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:13.1"); script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:13.2"); script_set_attribute(attribute:"patch_publication_date", value:"2015/03/20"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/30"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2015-2020 Tenable Network Security, Inc."); 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 !~ "^(SUSE13\.1|SUSE13\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "13.1 / 13.2", release); if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); ourarch = get_kb_item("Host/cpu"); if (!ourarch) audit(AUDIT_UNKNOWN_ARCH); if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch); flag = 0; if ( rpm_check(release:"SUSE13.1", reference:"mercurial-2.7.1-2.4.1") ) flag++; if ( rpm_check(release:"SUSE13.1", reference:"mercurial-debuginfo-2.7.1-2.4.1") ) flag++; if ( rpm_check(release:"SUSE13.1", reference:"mercurial-debugsource-2.7.1-2.4.1") ) flag++; if ( rpm_check(release:"SUSE13.1", reference:"mercurial-lang-2.7.1-2.4.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"mercurial-3.1.2-4.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"mercurial-debuginfo-3.1.2-4.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"mercurial-debugsource-3.1.2-4.1") ) flag++; if ( rpm_check(release:"SUSE13.2", reference:"mercurial-lang-3.1.2-4.1") ) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "mercurial / mercurial-debuginfo / mercurial-debugsource / etc"); }
NASL family Debian Local Security Checks NASL id DEBIAN_DLA-237.NASL description CVE-2014-9462 Jesse Hertz of Matasano Security discovered that Mercurial, a distributed version control system, is prone to a command injection vulnerability via a crafted repository name in a clone command. CVE-2014-9390 is a security vulnerability that affects mercurial repositories in a case-insensitive filesystem (eg. VFAT or HFS+). It allows for remote code execution of a specially crafted repository. This is less severe for the average Debian installation as they are usually set up with case-sensitive filesystems. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA 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 2015-06-05 plugin id 83995 published 2015-06-05 reporter This script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/83995 title Debian DLA-237-1 : mercurial security update 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 DLA-237-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(83995); script_version("2.8"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2014-9390", "CVE-2014-9462"); script_bugtraq_id(71732, 73688); script_name(english:"Debian DLA-237-1 : mercurial security update"); script_summary(english:"Checks dpkg output for the updated packages."); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security update." ); script_set_attribute( attribute:"description", value: "CVE-2014-9462 Jesse Hertz of Matasano Security discovered that Mercurial, a distributed version control system, is prone to a command injection vulnerability via a crafted repository name in a clone command. CVE-2014-9390 is a security vulnerability that affects mercurial repositories in a case-insensitive filesystem (eg. VFAT or HFS+). It allows for remote code execution of a specially crafted repository. This is less severe for the average Debian installation as they are usually set up with case-sensitive filesystems. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA 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://lists.debian.org/debian-lts-announce/2015/06/msg00001.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/squeeze-lts/mercurial" ); script_set_attribute( attribute:"solution", value:"Upgrade the affected mercurial, and mercurial-common packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Malicious Git and Mercurial HTTP Server For CVE-2014-9390'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:mercurial"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:mercurial-common"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0"); script_set_attribute(attribute:"vuln_publication_date", value:"2015/03/31"); script_set_attribute(attribute:"patch_publication_date", value:"2015/06/04"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/06/05"); script_set_attribute(attribute:"in_the_news", value:"true"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2015-2020 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:"mercurial", reference:"1.6.4-1+deb6u1")) flag++; if (deb_check(release:"6.0", prefix:"mercurial-common", reference:"1.6.4-1+deb6u1")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
References
- http://chargen.matasano.com/chargen/2015/3/17/this-new-vulnerability-mercurial-command-injection-cve-2014-9462.html
- http://mercurial.selenic.com/wiki/WhatsNew
- http://lists.opensuse.org/opensuse-updates/2015-03/msg00085.html
- http://www.osvdb.org/119816
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
- http://www.debian.org/security/2015/dsa-3257
- https://security.gentoo.org/glsa/201612-19