Vulnerabilities > CVE-2020-5496 - Out-of-bounds Write vulnerability in multiple products

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
fontforge
opensuse
CWE-787
nessus

Summary

FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.

Vulnerable Configurations

Part Description Count
Application
Fontforge
1
OS
Opensuse
1

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-202004-14.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-202004-14 (FontForge: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in FontForge. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could entice a user to open a specially crafted font using FontForge, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-05-08
    modified2020-05-01
    plugin id136213
    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/136213
    titleGLSA-202004-14 : FontForge: Multiple vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Gentoo Linux Security Advisory GLSA 202004-14.
    #
    # The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc.
    # and licensed under the Creative Commons - Attribution / Share Alike 
    # license. See http://creativecommons.org/licenses/by-sa/3.0/
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(136213);
      script_version("1.2");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/07");
    
      script_cve_id("CVE-2019-15785", "CVE-2020-5395", "CVE-2020-5496");
      script_xref(name:"GLSA", value:"202004-14");
    
      script_name(english:"GLSA-202004-14 : FontForge: Multiple vulnerabilities");
      script_summary(english:"Checks for updated package(s) in /var/db/pkg");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Gentoo host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote host is affected by the vulnerability described in GLSA-202004-14
    (FontForge: Multiple vulnerabilities)
    
        Multiple vulnerabilities have been discovered in FontForge. Please
          review the CVE identifiers referenced below for details.
      
    Impact :
    
        A remote attacker could entice a user to open a specially crafted font
          using FontForge, possibly resulting in execution of arbitrary code with
          the privileges of the process or a Denial of Service condition.
      
    Workaround :
    
        There is no known workaround at this time."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/202004-14"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All FontForge users should upgrade to the latest version:
          # emerge --sync
          # emerge --ask --oneshot --verbose '>=media-gfx/fontforge-20200314'"
      );
      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: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:gentoo:linux:fontforge");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/29");
      script_set_attribute(attribute:"patch_publication_date", value:"2020/04/30");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/01");
      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:"Gentoo Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("qpkg.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
    if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (qpkg_check(package:"media-gfx/fontforge", unaffected:make_list("ge 20200314"), vulnerable:make_list("lt 20200314"))) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = qpkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "FontForge");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-0118-1.NASL
    descriptionThis update for fontforge fixes the following issues : CVE-2020-5395: Fixed a use-after-free in SFD_GetFontMetaData() (bsc#1160220). CVE-2020-5496: Fixed a heap-based buffer overflow in Type2NotDefSplines() (bsc#1160236). 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 id133038
    published2020-01-17
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133038
    titleSUSE SLED15 / SLES15 Security Update : fontforge (SUSE-SU-2020:0118-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2020:0118-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(133038);
      script_version("1.2");
      script_cvs_date("Date: 2020/01/21");
    
      script_cve_id("CVE-2020-5395", "CVE-2020-5496");
    
      script_name(english:"SUSE SLED15 / SLES15 Security Update : fontforge (SUSE-SU-2020:0118-1)");
      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 fontforge fixes the following issues :
    
    CVE-2020-5395: Fixed a use-after-free in SFD_GetFontMetaData()
    (bsc#1160220).
    
    CVE-2020-5496: Fixed a heap-based buffer overflow in
    Type2NotDefSplines() (bsc#1160236).
    
    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=1160220"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1160236"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2020-5395/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2020-5496/"
      );
      # https://www.suse.com/support/update/announcement/2020/suse-su-20200118-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?8452b8bd"
      );
      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 Linux Enterprise Module for Open Buildservice Development Tools
    15-SP1 :
    
    zypper in -t patch
    SUSE-SLE-Module-Development-Tools-OBS-15-SP1-2020-118=1"
      );
      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:L/PR:N/UI:R/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:novell:suse_linux:fontforge");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:fontforge-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:fontforge-debugsource");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:fontforge-devel");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/03");
      script_set_attribute(attribute:"patch_publication_date", value:"2020/01/16");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/17");
      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:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "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 == "SLES15" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP1", os_ver + " SP" + sp);
    if (os_ver == "SLED15" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP1", os_ver + " SP" + sp);
    
    
    flag = 0;
    if (rpm_check(release:"SLES15", sp:"1", reference:"fontforge-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLES15", sp:"1", reference:"fontforge-debuginfo-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLES15", sp:"1", reference:"fontforge-debugsource-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLES15", sp:"1", reference:"fontforge-devel-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLED15", sp:"1", reference:"fontforge-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLED15", sp:"1", reference:"fontforge-debuginfo-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLED15", sp:"1", reference:"fontforge-debugsource-20170731-4.3.2")) flag++;
    if (rpm_check(release:"SLED15", sp:"1", reference:"fontforge-devel-20170731-4.3.2")) 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, "fontforge");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2020-89.NASL
    descriptionThis update for fontforge fixes the following issues : - CVE-2020-5395: Fixed a use-after-free in SFD_GetFontMetaData() (bsc#1160220). - CVE-2020-5496: Fixed a heap-based buffer overflow in Type2NotDefSplines() (bsc#1160236). This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-01
    modified2020-06-02
    plugin id133174
    published2020-01-22
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133174
    titleopenSUSE Security Update : fontforge (openSUSE-2020-89)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from openSUSE Security Update openSUSE-2020-89.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(133174);
      script_version("1.2");
      script_cvs_date("Date: 2020/01/24");
    
      script_cve_id("CVE-2020-5395", "CVE-2020-5496");
    
      script_name(english:"openSUSE Security Update : fontforge (openSUSE-2020-89)");
      script_summary(english:"Check for the openSUSE-2020-89 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 fontforge fixes the following issues :
    
      - CVE-2020-5395: Fixed a use-after-free in
        SFD_GetFontMetaData() (bsc#1160220).
    
      - CVE-2020-5496: Fixed a heap-based buffer overflow in
        Type2NotDefSplines() (bsc#1160236).
    
    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=1160220"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1160236"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected fontforge packages."
      );
      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:L/PR:N/UI:R/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:novell:opensuse:fontforge");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:fontforge-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:fontforge-debugsource");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:fontforge-devel");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/03");
      script_set_attribute(attribute:"patch_publication_date", value:"2020/01/21");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/22");
      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 !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);
    
    flag = 0;
    
    if ( rpm_check(release:"SUSE15.1", reference:"fontforge-20170731-lp151.4.3.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"fontforge-debuginfo-20170731-lp151.4.3.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"fontforge-debugsource-20170731-lp151.4.3.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"fontforge-devel-20170731-lp151.4.3.1") ) 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, "fontforge / fontforge-debuginfo / fontforge-debugsource / etc");
    }