Vulnerabilities > CVE-2007-6746 - Improper Input Validation vulnerability in Canonical Telepathy-Idle and Ubuntu Linux

047910
CVSS 5.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
NONE
network
canonical
CWE-20
nessus

Summary

telepathy-idle before 0.1.15 does not verify (1) that the issuer is a trusted CA, (2) that the server hostname matches a domain name in the subject's Common Name (CN), or (3) the expiration date of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

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 familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-1821-1.NASL
    descriptionIt was discovered that telepathy-idle did not perform any server certificate validation when using SSL connections. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to alter or compromise confidential information. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id66372
    published2013-05-10
    reporterUbuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/66372
    titleUbuntu 12.04 LTS / 12.10 / 13.04 : telepathy-idle vulnerability (USN-1821-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-1821-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(66372);
      script_version("1.9");
      script_cvs_date("Date: 2019/09/19 12:54:29");
    
      script_cve_id("CVE-2007-6746");
      script_bugtraq_id(59474);
      script_xref(name:"USN", value:"1821-1");
    
      script_name(english:"Ubuntu 12.04 LTS / 12.10 / 13.04 : telepathy-idle vulnerability (USN-1821-1)");
      script_summary(english:"Checks dpkg output for updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Ubuntu host is missing a security-related patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "It was discovered that telepathy-idle did not perform any server
    certificate validation when using SSL connections. If a remote
    attacker were able to perform a man-in-the-middle attack, this flaw
    could be exploited to alter or compromise confidential information.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Ubuntu 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://usn.ubuntu.com/1821-1/"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected telepathy-idle 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:canonical:ubuntu_linux:telepathy-idle");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.04:-:lts");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:12.10");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:13.04");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2013/05/21");
      script_set_attribute(attribute:"patch_publication_date", value:"2013/05/09");
      script_set_attribute(attribute:"plugin_publication_date", value:"2013/05/10");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2013-2019 Canonical, Inc. / NASL script (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! preg(pattern:"^(12\.04|12\.10|13\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 12.04 / 12.10 / 13.04", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"12.04", pkgname:"telepathy-idle", pkgver:"0.1.11-2ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"12.10", pkgname:"telepathy-idle", pkgver:"0.1.12-1ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"13.04", pkgname:"telepathy-idle", pkgver:"0.1.14-1ubuntu0.1")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "telepathy-idle");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2013-427.NASL
    descriptionChanges in telepathy-idle : - Add telepathy-idle-require-tls-validation.patch (bnc#817120, CVE-2007-6746). This fixes flaws in the SSL certificate validation.
    last seen2020-06-05
    modified2014-06-13
    plugin id75000
    published2014-06-13
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/75000
    titleopenSUSE Security Update : telepathy-idle (openSUSE-SU-2013:0915-1)
    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-2013-427.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(75000);
      script_version("1.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2007-6746");
    
      script_name(english:"openSUSE Security Update : telepathy-idle (openSUSE-SU-2013:0915-1)");
      script_summary(english:"Check for the openSUSE-2013-427 patch");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote openSUSE host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Changes in telepathy-idle :
    
      - Add telepathy-idle-require-tls-validation.patch
        (bnc#817120, CVE-2007-6746). This fixes flaws in the SSL
        certificate validation."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.novell.com/show_bug.cgi?id=817120"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://lists.opensuse.org/opensuse-updates/2013-05/msg00022.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://lists.opensuse.org/opensuse-updates/2013-06/msg00052.html"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected telepathy-idle packages."
      );
      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:novell:opensuse:telepathy-idle");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:telepathy-idle-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:telepathy-idle-debugsource");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:12.2");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:12.3");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2013/05/03");
      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|SUSE12\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "12.2 / 12.3", 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:"telepathy-idle-0.1.11-3.4.1") ) flag++;
    if ( rpm_check(release:"SUSE12.2", reference:"telepathy-idle-debuginfo-0.1.11-3.4.1") ) flag++;
    if ( rpm_check(release:"SUSE12.2", reference:"telepathy-idle-debugsource-0.1.11-3.4.1") ) flag++;
    if ( rpm_check(release:"SUSE12.3", reference:"telepathy-idle-0.1.14-2.4.1") ) flag++;
    if ( rpm_check(release:"SUSE12.3", reference:"telepathy-idle-debuginfo-0.1.14-2.4.1") ) flag++;
    if ( rpm_check(release:"SUSE12.3", reference:"telepathy-idle-debugsource-0.1.14-2.4.1") ) 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, "telepathy-idle / telepathy-idle-debuginfo / etc");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2013-6534.NASL
    descriptionThis release validate TLS certificates properly, preventing man-in-the-middle attacks. This will be a regression for users of IRC-over-SSL servers/proxies that do not have a certificate trusted by system-wide CA configuration; they will no longer be able to connect. If someone implements fd.o #57130, that will provide the ability for those users to approve additional certificates. 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 seen2020-03-17
    modified2013-05-03
    plugin id66297
    published2013-05-03
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/66297
    titleFedora 18 : telepathy-idle-0.1.15-1.fc18 (2013-6534)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_TELEPATHY-IDLE-130815.NASL
    descriptionTelepathy-idle did not check SSL certificates. CVE-2007-6746 was assigned to this issue.
    last seen2020-06-05
    modified2013-08-21
    plugin id69414
    published2013-08-21
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69414
    titleSuSE 11.2 / 11.3 Security Update : telepathy-idle (SAT Patch Numbers 8215 / 8216)