Vulnerabilities > CVE-2018-19131 - Cross-site Scripting vulnerability in Squid-Cache Squid

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
PARTIAL
Availability impact
NONE
network
squid-cache
CWE-79
nessus

Summary

Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.

Vulnerable Configurations

Part Description Count
Application
Squid-Cache
236

Common Attack Pattern Enumeration and Classification (CAPEC)

  • 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.
  • Embedding Scripts in Non-Script Elements
    This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Cross-Site Scripting in Error Pages
    An attacker distributes a link (or possibly some other query structure) with a request to a third party web server that is malformed and also contains a block of exploit code in order to have the exploit become live code in the resulting error page. When the third party web server receives the crafted request and notes the error it then creates an error message that echoes the malformed message, including the exploit. Doing this converts the exploit portion of the message into to valid language elements that are executed by the viewing browser. When a victim executes the query provided by the attacker the infected error message error message is returned including the exploit code which then runs in the victim's browser. XSS can result in execution of code as well as data leakage (e.g. session cookies can be sent to the attacker). This type of attack is especially dangerous since the exploit appears to come from the third party web server, who the victim may trust and hence be more vulnerable to deception.
  • Cross-Site Scripting Using Alternate Syntax
    The attacker uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-1429.NASL
    descriptionThis update for squid fixes the following issues : Security issues fixed : - CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). - CVE-2018-19132: Fixed small memory leak in processing of SNMP packets (bsc#1113669). Non-security issues fixed : - Create runtime directories needed when SMP mode is enabled (bsc#1112695, bsc#1112066). - Install license correctly (bsc#1082318). This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-05
    modified2018-11-21
    plugin id119079
    published2018-11-21
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119079
    titleopenSUSE Security Update : squid (openSUSE-2018-1429)
    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-2018-1429.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(119079);
      script_version("1.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2018-19131", "CVE-2018-19132");
    
      script_name(english:"openSUSE Security Update : squid (openSUSE-2018-1429)");
      script_summary(english:"Check for the openSUSE-2018-1429 patch");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote openSUSE host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for squid fixes the following issues :
    
    Security issues fixed :
    
      - CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability
        in the TLS error handling (bsc#1113668).
    
      - CVE-2018-19132: Fixed small memory leak in processing of
        SNMP packets (bsc#1113669).
    
    Non-security issues fixed :
    
      - Create runtime directories needed when SMP mode is
        enabled (bsc#1112695, bsc#1112066).
    
      - Install license correctly (bsc#1082318).
    
    This update was imported from the SUSE:SLE-15:Update update project."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1082318"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1112066"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1112695"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1113668"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1113669"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected squid packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:squid");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:squid-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:squid-debugsource");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2018/11/20");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/21");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 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 !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", 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 !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);
    
    flag = 0;
    
    if ( rpm_check(release:"SUSE15.0", reference:"squid-4.4-lp150.4.3.2") ) flag++;
    if ( rpm_check(release:"SUSE15.0", reference:"squid-debuginfo-4.4-lp150.4.3.2") ) flag++;
    if ( rpm_check(release:"SUSE15.0", reference:"squid-debugsource-4.4-lp150.4.3.2") ) 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, "squid / squid-debuginfo / squid-debugsource");
    }
    
  • NASL familyFirewalls
    NASL idSQUID_2018_4.NASL
    descriptionAccording to its banner, the version of Squid running on the remote host is 3.1.x after or equal to 3.1.12.1 and prior or equal to 3.1.23, 3.2.x after or equal to 3.2.0.4, 3.3.x, 3.4.x, 3.5.x prior or equal to 3.5.28, or 4.x prior to 4.4. It is, therefore, affected by a cross-site scripting (XSS) vulnerability due to improper validation of user-supplied input before returning it to users. A remote attacker controlled server can exploit this, by triggering error page delivery to a client with injected arbitrary script code that will execute in the client
    last seen2020-06-01
    modified2020-06-02
    plugin id119726
    published2018-12-17
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119726
    titleSquid 3.1.12.1 <= 3.1.x <= 3.1.23 / 3.2.0.4 <= 3.2.x / 3.3.x / 3.4.x / 3.5.x <= 3.5.28 / 4.x < 4.4 Cross-Site Scripting Vulnerability (SQUID-2018:4)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-714298460E.NASL
    descriptionVersion update + Security fix for CVE-2018-19131 and CVE-2018-19132 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 id120523
    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/120523
    titleFedora 29 : 7:squid (2018-714298460e)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-3771-1.NASL
    descriptionThis update for squid fixes the following issues : Security issues fixed : CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). CVE-2018-19132: Fixed small memory leak in processing of SNMP packets (bsc#1113669). Non-security issues fixed: Create runtime directories needed when SMP mode is enabled (bsc#1112695, bsc#1112066). Install license correctly (bsc#1082318). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id119012
    published2018-11-16
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119012
    titleSUSE SLES12 Security Update : squid (SUSE-SU-2018:3771-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-3790-1.NASL
    descriptionThis update for squid3 fixes the following issues : Security issue fixed : CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id119035
    published2018-11-19
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119035
    titleSUSE SLES11 Security Update : squid3 (SUSE-SU-2018:3790-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-3771-2.NASL
    descriptionThis update for squid fixes the following issues : Security issues fixed : CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). CVE-2018-19132: Fixed small memory leak in processing of SNMP packets (bsc#1113669). Non-security issues fixed: Create runtime directories needed when SMP mode is enabled (bsc#1112695, bsc#1112066). Install license correctly (bsc#1082318). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-05-12
    modified2018-12-10
    plugin id119554
    published2018-12-10
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119554
    titleSUSE SLES12 Security Update : squid (SUSE-SU-2018:3771-2)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-2231.NASL
    descriptionAccording to the versions of the squid packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Incorrect HTTP Request header comparison in Squid HTTP Proxy 3.5.0.1 through 3.5.22, and 4.0.1 through 4.0.16 results in Collapsed Forwarding feature mistakenly identifying some private responses as being suitable for delivery to multiple clients.(CVE-2016-10003) - Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.(CVE-2018-19131) - Squid before 4.4, when SNMP is enabled, allows a denial of service (Memory Leak) via an SNMP packet.(CVE-2018-19132) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-05-08
    modified2019-11-08
    plugin id130693
    published2019-11-08
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/130693
    titleEulerOS 2.0 SP5 : squid (EulerOS-SA-2019-2231)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-936.NASL
    descriptionThis update for squid fixes the following issues : Security issues fixed : - CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). - CVE-2018-19132: Fixed small memory leak in processing of SNMP packets (bsc#1113669). Non-security issues fixed : - Create runtime directories needed when SMP mode is enabled (bsc#1112695, bsc#1112066). - Install license correctly (bsc#1082318). This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-01
    modified2020-06-02
    plugin id123382
    published2019-03-27
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123382
    titleopenSUSE Security Update : squid (openSUSE-2019-936)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-3786-1.NASL
    descriptionThis update for squid fixes the following issues : Security issues fixed : CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). CVE-2018-19132: Fixed small memory leak in processing of SNMP packets (bsc#1113669). Non-security issues fixed: Create runtime directories needed when SMP mode is enabled (bsc#1112695, bsc#1112066). Install license correctly (bsc#1082318). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-18
    modified2019-01-02
    plugin id120164
    published2019-01-02
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120164
    titleSUSE SLES15 Security Update : squid (SUSE-SU-2018:3786-1)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-2445.NASL
    descriptionAccording to the versions of the squid packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors.(CVE-2018-19131) - Squid before 4.4, when SNMP is enabled, allows a denial of service (Memory Leak) via an SNMP packet.(CVE-2018-19132) - Incorrect HTTP Request header comparison in Squid HTTP Proxy 3.5.0.1 through 3.5.22, and 4.0.1 through 4.0.16 results in Collapsed Forwarding feature mistakenly identifying some private responses as being suitable for delivery to multiple clients.(CVE-2016-10003) - An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token
    last seen2020-05-08
    modified2019-12-04
    plugin id131599
    published2019-12-04
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131599
    titleEulerOS 2.0 SP2 : squid (EulerOS-SA-2019-2445)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-1044.NASL
    descriptionAccording to the versions of the squid packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A Cross-Site Scripting vulnerability has been discovered in squid in the way X.509 certificates fields are displayed in some error pages. An attacker who can control the certificate of the origin content server may use this flaw to inject scripting code in the squid generated page, which is executed on the client
    last seen2020-05-06
    modified2019-02-15
    plugin id122217
    published2019-02-15
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/122217
    titleEulerOS 2.0 SP3 : squid (EulerOS-SA-2019-1044)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-1428.NASL
    descriptionThis update for squid fixes the following issues : Security issues fixed : - CVE-2018-19131: Fixed Cross-Site-Scripting vulnerability in the TLS error handling (bsc#1113668). - CVE-2018-19132: Fixed small memory leak in processing of SNMP packets (bsc#1113669). Non-security issues fixed : - Create runtime directories needed when SMP mode is enabled (bsc#1112695, bsc#1112066). - Install license correctly (bsc#1082318).
    last seen2020-06-05
    modified2018-11-21
    plugin id119078
    published2018-11-21
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119078
    titleopenSUSE Security Update : squid (openSUSE-2018-1428)