Vulnerabilities > CVE-2020-8517 - Improper Input Validation 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
squid-cache
opensuse
canonical
CWE-20
nessus
NVD
Published: 2020-02-04
Updated: 2021-07-21

Summary

An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

Vulnerable Configurations

Part Description Count
Application
Squid-Cache
243
OS
Opensuse
1
OS
Canonical
3

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 familySuSE Local Security Checks
    NASL idOPENSUSE-2020-606.NASL
    descriptionThis update for squid to version 4.10 fixes the following issues : Security issues fixed : - CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway (bsc#1162689). - CVE-2020-8449: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). - CVE-2020-8450: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). - CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). Non-security issue fixed : - Improved cache handling with chunked responses. This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-05-08
    modified2020-05-04
    plugin id136316
    published2020-05-04
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136316
    titleopenSUSE Security Update : squid (openSUSE-2020-606)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2020-606.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(136316);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/07");

  script_cve_id("CVE-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517");

  script_name(english:"openSUSE Security Update : squid (openSUSE-2020-606)");
  script_summary(english:"Check for the openSUSE-2020-606 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 to version 4.10 fixes the following issues :

Security issues fixed :

  - CVE-2019-12528: Fixed an information disclosure flaw in
    the FTP gateway (bsc#1162689).

  - CVE-2020-8449: Fixed a buffer overflow when squid is
    acting as reverse-proxy (bsc#1162687).

  - CVE-2020-8450: Fixed a buffer overflow when squid is
    acting as reverse-proxy (bsc#1162687).

  - CVE-2020-8517: Fixed a buffer overflow in
    ext_lm_group_acl when processing NTLM Authentication
    credentials (bsc#1162691).

Non-security issue fixed :

  - Improved cache handling with chunked responses.

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=1162687"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1162689"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1162691"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected squid 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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8450");
  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: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:15.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/04");
  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:"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\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.1", 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:"SUSE15.1", reference:"squid-4.10-lp151.2.14.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"squid-debuginfo-4.10-lp151.2.14.1") ) flag++;
if ( rpm_check(release:"SUSE15.1", reference:"squid-debugsource-4.10-lp151.2.14.1") ) 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, "squid / squid-debuginfo / squid-debugsource");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-0661-1.NASL
    descriptionThis update for squid fixes the following issues : CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway (bsc#1162689). CVE-2019-12526: Fixed potential remote code execution during URN processing (bsc#1156326). CVE-2019-12523,CVE-2019-18676: Fixed multiple improper validations in URI processing (bsc#1156329). CVE-2019-18677: Fixed Cross-Site Request Forgery in HTTP Request processing (bsc#1156328). CVE-2019-18678: Fixed incorrect message parsing which could have led to HTTP request splitting issue (bsc#1156323). CVE-2019-18679: Fixed information disclosure when processing HTTP Digest Authentication (bsc#1156324). CVE-2020-8449: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). CVE-2020-8450: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). 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 seen2020-03-19
    modified2020-03-13
    plugin id134561
    published2020-03-13
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134561
    titleSUSE SLES12 Security Update : squid (SUSE-SU-2020:0661-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2020:0661-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(134561);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/18");

  script_cve_id("CVE-2019-12523", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517");

  script_name(english:"SUSE SLES12 Security Update : squid (SUSE-SU-2020:0661-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for squid fixes the following issues :

CVE-2019-12528: Fixed an information disclosure flaw in the FTP
gateway (bsc#1162689).

CVE-2019-12526: Fixed potential remote code execution during URN
processing (bsc#1156326).

CVE-2019-12523,CVE-2019-18676: Fixed multiple improper validations in
URI processing (bsc#1156329).

CVE-2019-18677: Fixed Cross-Site Request Forgery in HTTP Request
processing (bsc#1156328).

CVE-2019-18678: Fixed incorrect message parsing which could have led
to HTTP request splitting issue (bsc#1156323).

CVE-2019-18679: Fixed information disclosure when processing HTTP
Digest Authentication (bsc#1156324).

CVE-2020-8449: Fixed a buffer overflow when squid is acting as
reverse-proxy (bsc#1162687).

CVE-2020-8450: Fixed a buffer overflow when squid is acting as
reverse-proxy (bsc#1162687).

CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when
processing NTLM Authentication credentials (bsc#1162691).

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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1156323"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1156324"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1156326"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1156328"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1156329"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1162687"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1162689"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1162691"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-12523/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-12526/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-12528/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18676/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18677/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18678/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18679/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-8449/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-8450/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-8517/"
  );
  # https://www.suse.com/support/update/announcement/2020/suse-su-20200661-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?176ea211"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE OpenStack Cloud Crowbar 8:zypper in -t patch
SUSE-OpenStack-Cloud-Crowbar-8-2020-661=1

SUSE OpenStack Cloud 8:zypper in -t patch
SUSE-OpenStack-Cloud-8-2020-661=1

SUSE OpenStack Cloud 7:zypper in -t patch
SUSE-OpenStack-Cloud-7-2020-661=1

SUSE Linux Enterprise Server for SAP 12-SP3:zypper in -t patch
SUSE-SLE-SAP-12-SP3-2020-661=1

SUSE Linux Enterprise Server for SAP 12-SP2:zypper in -t patch
SUSE-SLE-SAP-12-SP2-2020-661=1

SUSE Linux Enterprise Server 12-SP4:zypper in -t patch
SUSE-SLE-SERVER-12-SP4-2020-661=1

SUSE Linux Enterprise Server 12-SP3-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2020-661=1

SUSE Linux Enterprise Server 12-SP3-BCL:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-BCL-2020-661=1

SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2020-661=1

SUSE Linux Enterprise Server 12-SP2-BCL:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-BCL-2020-661=1

SUSE Enterprise Storage 5:zypper in -t patch SUSE-Storage-5-2020-661=1

HPE Helion Openstack 8:zypper in -t patch
HPE-Helion-OpenStack-8-2020-661=1"
  );
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8450");
  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:novell:suse_linux:squid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:squid-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:squid-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/13");
  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:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(2|3|4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2/3/4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"4", reference:"squid-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"squid-debuginfo-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"squid-debugsource-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"squid-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"squid-debuginfo-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"squid-debugsource-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"squid-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"squid-debuginfo-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"squid-debugsource-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"squid-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"squid-debuginfo-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"squid-debugsource-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"squid-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"squid-debuginfo-3.5.21-26.20.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"squid-debugsource-3.5.21-26.20.1")) 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, "squid");
}
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_57C1C2EE791411EA90BF0800276545C1.NASL
    descriptionThe Squid developers reports : Improper Input Validation issues in HTTP Request processing (CVE-2020-8449, CVE-2020-8450). Information Disclosure issue in FTP Gateway (CVE-2019-12528). Buffer Overflow issue in ext_lm_group_acl helper (CVE-2020-8517).
    last seen2020-05-08
    modified2020-05-04
    plugin id136302
    published2020-05-04
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136302
    titleFreeBSD : Squid -- multiple vulnerabilities (57c1c2ee-7914-11ea-90bf-0800276545c1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2020 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(136302);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/07");

  script_cve_id("CVE-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517");

  script_name(english:"FreeBSD : Squid -- multiple vulnerabilities (57c1c2ee-7914-11ea-90bf-0800276545c1)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The Squid developers reports :

Improper Input Validation issues in HTTP Request processing
(CVE-2020-8449, CVE-2020-8450).

Information Disclosure issue in FTP Gateway (CVE-2019-12528).

Buffer Overflow issue in ext_lm_group_acl helper (CVE-2020-8517)."
  );
  # http://lists.squid-cache.org/pipermail/squid-announce/2020-February/000107.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?02cc4f07"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244026"
  );
  # https://vuxml.freebsd.org/freebsd/57c1c2ee-7914-11ea-90bf-0800276545c1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?bdaa9902"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8450");
  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:freebsd:freebsd:squid");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/04");
  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:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"squid<4.10")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2020-1326.NASL
    descriptionAccording to the versions of the squid package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users
    last seen2020-05-06
    modified2020-03-23
    plugin id134817
    published2020-03-23
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134817
    titleEulerOS 2.0 SP5 : squid (EulerOS-SA-2020-1326)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-0487-1.NASL
    descriptionThis update for squid to version 4.10 fixes the following issues : Security issues fixed : CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway (bsc#1162689). CVE-2020-8449: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). CVE-2020-8450: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). Non-security issue fixed: Improved cache handling with chunked responses. 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
    modified2020-02-27
    plugin id134099
    published2020-02-27
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134099
    titleSUSE SLES12 Security Update : squid (SUSE-SU-2020:0487-1)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2020-623.NASL
    descriptionThis update for squid to version 4.11 fixes the following issues : - CVE-2020-11945: Fixed a potential remote code execution vulnerability when using HTTP Digest Authentication (bsc#1170313). - CVE-2019-12519, CVE-2019-12521: Fixed incorrect buffer handling that can result in cache poisoning, remote execution, and denial of service attacks when processing ESI responses (bsc#1169659). - CVE-2020-8517: Fixed a possible denial of service caused by incorrect buffer management ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). - CVE-2019-12528: Fixed possible information disclosure when translating FTP server listings into HTTP responses (bsc#1162689). - CVE-2019-18860: Fixed handling of invalid domain names in cachemgr.cgi (bsc#1167373). This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-05-15
    modified2020-05-11
    plugin id136452
    published2020-05-11
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136452
    titleopenSUSE Security Update : squid (openSUSE-2020-623)
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2020-1591.NASL
    descriptionAccording to the versions of the squid package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - An issue was discovered in Squid before 4.10. Due to incorrect input validation, it can interpret crafted HTTP requests in unexpected ways to access server resources prohibited by earlier security filters.(CVE-2020-8449) - An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy.(CVE-2020-8450) - An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.(CVE-2020-8517) 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 seen2020-06-06
    modified2020-05-26
    plugin id136869
    published2020-05-26
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136869
    titleEulerOS 2.0 SP8 : squid (EulerOS-SA-2020-1591)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-202003-34.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-202003-34 (Squid: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Squid. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, by sending a specially crafted request, could possibly execute arbitrary code with the privileges of the process, obtain sensitive information or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-03-21
    modified2020-03-18
    plugin id134640
    published2020-03-18
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134640
    titleGLSA-202003-34 : Squid: Multiple vulnerabilities
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2020-307.NASL
    descriptionThis update for squid to version 4.10 fixes the following issues : Security issues fixed : - CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway (bsc#1162689). - CVE-2020-8449: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). - CVE-2020-8450: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). - CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). Non-security issue fixed : - Improved cache handling with chunked responses. This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-03-18
    modified2020-03-06
    plugin id134284
    published2020-03-06
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134284
    titleopenSUSE Security Update : squid (openSUSE-2020-307)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-1134-1.NASL
    descriptionThis update for squid to version 4.11 fixes the following issues : CVE-2020-11945: Fixed a potential remote code execution vulnerability when using HTTP Digest Authentication (bsc#1170313). CVE-2019-12519, CVE-2019-12521: Fixed incorrect buffer handling that can result in cache poisoning, remote execution, and denial of service attacks when processing ESI responses (bsc#1169659). CVE-2020-8517: Fixed a possible denial of service caused by incorrect buffer management ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). CVE-2019-12528: Fixed possible information disclosure when translating FTP server listings into HTTP responses (bsc#1162689). CVE-2019-18860: Fixed handling of invalid domain names in cachemgr.cgi (bsc#1167373). 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 seen2020-05-06
    modified2020-04-29
    plugin id136081
    published2020-04-29
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136081
    titleSUSE SLES12 Security Update : squid (SUSE-SU-2020:1134-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-1156-1.NASL
    descriptionThis update for squid to version 4.11 fixes the following issues : CVE-2020-11945: Fixed a potential remote code execution vulnerability when using HTTP Digest Authentication (bsc#1170313). CVE-2019-12519, CVE-2019-12521: Fixed incorrect buffer handling that can result in cache poisoning, remote execution, and denial of service attacks when processing ESI responses (bsc#1169659). CVE-2020-8517: Fixed a possible denial of service caused by incorrect buffer management ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). CVE-2019-12528: Fixed possible information disclosure when translating FTP server listings into HTTP responses (bsc#1162689). CVE-2019-18860: Fixed handling of invalid domain names in cachemgr.cgi (bsc#1167373). 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 seen2020-05-08
    modified2020-05-01
    plugin id136279
    published2020-05-01
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/136279
    titleSUSE SLES15 Security Update : squid (SUSE-SU-2020:1156-1)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-4289-1.NASL
    descriptionJeriko One discovered that Squid incorrectly handled memory when connected to an FTP server. A remote attacker could possibly use this issue to obtain sensitive information from Squid memory. (CVE-2019-12528) Regis Leroy discovered that Squid incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to access server resources prohibited by earlier security filters. (CVE-2020-8449) Guido Vranken discovered that Squid incorrectly handled certain buffer operations when acting as a reverse proxy. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-8450) Aaron Costello discovered that Squid incorrectly handled certain NTLM authentication credentials. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2020-8517). 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 seen2020-03-18
    modified2020-02-24
    plugin id133951
    published2020-02-24
    reporterUbuntu Security Notice (C) 2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133951
    titleUbuntu 16.04 LTS / 18.04 LTS / 19.10 : squid, squid3 vulnerabilities (USN-4289-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-0493-1.NASL
    descriptionThis update for squid to version 4.10 fixes the following issues : Security issues fixed : CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway (bsc#1162689). CVE-2020-8449: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). CVE-2020-8450: Fixed a buffer overflow when squid is acting as reverse-proxy (bsc#1162687). CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when processing NTLM Authentication credentials (bsc#1162691). Non-security issue fixed: Improved cache handling with chunked responses. 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
    modified2020-02-27
    plugin id134103
    published2020-02-27
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134103
    titleSUSE SLES15 Security Update : squid (SUSE-SU-2020:0493-1)

References