Vulnerabilities > CVE-2020-10936 - Improper Privilege Management vulnerability in multiple products

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH

Summary

Sympa before 6.2.56 allows privilege escalation.

Vulnerable Configurations

Part Description Count
Application
Sympa
241
OS
Fedoraproject
2
OS
Debian
2
OS
Canonical
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-D767D9077B.NASL
    descriptionUpdate to sympa 6.2.56. Fixes CVE-2020-10936. For details, see : - https://github.com/sympa-community/sympa/releases/tag/6.2.56 - https://sympa-community.github.io/security/2020-002.html Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-11
    modified2020-06-08
    plugin id137214
    published2020-06-08
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137214
    titleFedora 32 : sympa (2020-d767d9077b)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2020-d767d9077b.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(137214);
      script_version("1.2");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/10");
    
      script_cve_id("CVE-2020-10936");
      script_xref(name:"FEDORA", value:"2020-d767d9077b");
    
      script_name(english:"Fedora 32 : sympa (2020-d767d9077b)");
      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 sympa 6.2.56.
    
    Fixes CVE-2020-10936.
    
    For details, see :
    
    - https://github.com/sympa-community/sympa/releases/tag/6.2.56
    
    - https://sympa-community.github.io/security/2020-002.html
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    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://bodhi.fedoraproject.org/updates/FEDORA-2020-d767d9077b"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://sympa-community.github.io/security/2020-002.html"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected sympa package.");
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:sympa");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:32");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/27");
      script_set_attribute(attribute:"patch_publication_date", value:"2020/06/07");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/08");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 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 = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^32([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 32", "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:"FC32", reference:"sympa-6.2.56-1.fc32")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "sympa");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-9B6C969AAC.NASL
    descriptionUpdate to sympa 6.2.56. Fixes CVE-2020-10936. For details, see : - https://github.com/sympa-community/sympa/releases/tag/6.2.56 - https://sympa-community.github.io/security/2020-002.html Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-06
    modified2020-06-02
    plugin id137011
    published2020-06-02
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137011
    titleFedora 31 : sympa (2020-9b6c969aac)