Vulnerabilities > CVE-2018-6519 - Injection vulnerability in multiple products

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
simplesamlphp
debian
CWE-74
nessus

Summary

The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.

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 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.
  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-8CDA2309D6.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2019-01-03
    plugin id120598
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120598
    titleFedora 28 : php-simplesamlphp-saml2_3 (2018-8cda2309d6)
    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 FEDORA-2018-8cda2309d6.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(120598);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2018-6519", "CVE-2018-7644", "CVE-2018-7711");
      script_xref(name:"FEDORA", value:"2018-8cda2309d6");
    
      script_name(english:"Fedora 28 : php-simplesamlphp-saml2_3 (2018-8cda2309d6)");
      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:
    "  - [SSPSA 201803-01 /
        CVE-2018-7711](https://simplesamlphp.org/security/201803
        -01)
    
      - [SSPSA 201802-01 /
        CVE-2018-7644](https://simplesamlphp.org/security/201802
        -01)
    
      - [SSPSA 201801-01 /
        CVE-2018-6519](https://simplesamlphp.org/security/201801
        -01)
    
    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-2018-8cda2309d6"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected php-simplesamlphp-saml2_3 package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/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:php-simplesamlphp-saml2_3");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:28");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/02");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/03/30");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/03");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 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:"^28([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 28", "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:"FC28", reference:"php-simplesamlphp-saml2_3-3.1.4-3.fc28")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "php-simplesamlphp-saml2_3");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-37E28670F2.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2018-03-27
    plugin id108615
    published2018-03-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108615
    titleFedora 27 : php-simplesamlphp-saml2_3 (2018-37e28670f2)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4127.NASL
    descriptionSeveral vulnerabilities have been discovered in SimpleSAMLphp, a framework for authentication, primarily via the SAML protocol. - CVE-2017-12867 Attackers with access to a secret token could extend its validity period by manipulating the prepended time offset. - CVE-2017-12869 When using the multiauth module, attackers can bypass authentication context restrictions and use any authentication source defined in the config. - CVE-2017-12873 Defensive measures have been taken to prevent the administrator from misconfiguring persistent NameIDs to avoid identifier clash. (Affects Debian 8 Jessie only.) - CVE-2017-12874 The InfoCard module could accept incorrectly signed XML messages in rare occasions. - CVE-2017-18121 The consentAdmin module was vulnerable to a Cross-Site Scripting attack, allowing an attacker to craft links that could execute arbitrary JavaScript code in the victim
    last seen2020-06-01
    modified2020-06-02
    plugin id107119
    published2018-03-05
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/107119
    titleDebian DSA-4127-1 : simplesamlphp - security update
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-0EE228DA17.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2019-01-03
    plugin id120236
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120236
    titleFedora 28 : php-simplesamlphp-saml2_1 (2018-0ee228da17)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-F4AB4D96F9.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2018-03-27
    plugin id108622
    published2018-03-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108622
    titleFedora 26 : php-simplesamlphp-saml2 (2018-f4ab4d96f9)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-96601292A2.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2018-03-27
    plugin id108619
    published2018-03-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108619
    titleFedora 27 : php-simplesamlphp-saml2_1 (2018-96601292a2)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-6DB40B0C37.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2018-03-27
    plugin id108618
    published2018-03-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108618
    titleFedora 27 : php-simplesamlphp-saml2 (2018-6db40b0c37)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-D809BD2FD6.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2018-03-27
    plugin id108620
    published2018-03-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108620
    titleFedora 26 : php-simplesamlphp-saml2_1 (2018-d809bd2fd6)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-85CB15BEFD.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2019-01-03
    plugin id120582
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120582
    titleFedora 28 : php-simplesamlphp-saml2 (2018-85cb15befd)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-F2097D8937.NASL
    description - [SSPSA 201803-01 / CVE-2018-7711](https://simplesamlphp.org/security/201803 -01) - [SSPSA 201802-01 / CVE-2018-7644](https://simplesamlphp.org/security/201802 -01) - [SSPSA 201801-01 / CVE-2018-6519](https://simplesamlphp.org/security/201801 -01) 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 seen2020-06-05
    modified2018-03-27
    plugin id108621
    published2018-03-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108621
    titleFedora 26 : php-simplesamlphp-saml2_3 (2018-f2097d8937)