Vulnerabilities > CVE-2017-7483 - Out-of-bounds Read vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
rxvt-project
debian
CWE-125
nessus

Summary

Rxvt 2.7.10 is vulnerable to a denial of service attack by passing the value -2^31 inside a terminal escape code, which results in a non-invertible integer that eventually leads to a segfault due to an out of bounds read.

Vulnerable Configurations

Part Description Count
Application
Rxvt_Project
1
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-670.NASL
    descriptionThis update for rxvt-unicode fixes the following issue : While urxvt is not directly affected by CVE-2017-7483 we have added a patch to harden urxvt to avoid similar bugs in the future. (boo#1036456)
    last seen2020-06-05
    modified2017-06-09
    plugin id100715
    published2017-06-09
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/100715
    titleopenSUSE Security Update : rxvt-unicode (openSUSE-2017-670)
    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-2017-670.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(100715);
      script_version("3.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2017-7483");
    
      script_name(english:"openSUSE Security Update : rxvt-unicode (openSUSE-2017-670)");
      script_summary(english:"Check for the openSUSE-2017-670 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 rxvt-unicode fixes the following issue :
    
    While urxvt is not directly affected by CVE-2017-7483 we have added a
    patch to harden urxvt to avoid similar bugs in the future.
    (boo#1036456)"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1036456"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected rxvt-unicode packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:rxvt-unicode");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:rxvt-unicode-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:rxvt-unicode-debugsource");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:42.2");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2017/06/09");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/09");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc.");
      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 !~ "^(SUSE42\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "42.2", 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:"SUSE42.2", reference:"rxvt-unicode-9.21-6.3.1") ) flag++;
    if ( rpm_check(release:"SUSE42.2", reference:"rxvt-unicode-debuginfo-9.21-6.3.1") ) flag++;
    if ( rpm_check(release:"SUSE42.2", reference:"rxvt-unicode-debugsource-9.21-6.3.1") ) 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, "rxvt-unicode / rxvt-unicode-debuginfo / rxvt-unicode-debugsource");
    }
    
  • NASL familySlackware Local Security Checks
    NASL idSLACKWARE_SSA_2017-121-01.NASL
    descriptionNew rxvt packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix a security issue.
    last seen2020-06-01
    modified2020-06-02
    plugin id99917
    published2017-05-02
    reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/99917
    titleSlackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : rxvt (SSA:2017-121-01)