RHEL 2.1 : kernel (RHSA-2003:389)

2004-07-06T00:00:00
ID REDHAT-RHSA-2003-389.NASL
Type nessus
Reporter This script is Copyright (C) 2004-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-02T00:00:00

Description

Updated kernel packages are now available that fix a security vulnerability allowing local users to gain root privileges.

The Linux kernel handles the basic functions of the operating system.

A flaw in bounds checking in the do_brk() function in the Linux kernel versions 2.4.22 and previous can allow a local attacker to gain root privileges. This issue is known to be exploitable; an exploit has been seen in the wild that takes advantage of this vulnerability. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2003-0961 to this issue.

All users of Red Hat Enterprise Linux 2.1 are advised to upgrade to these errata packages, which contain a backported security patch that corrects this vulnerability.

Users of Red Hat Enterprise Linux 3 should upgrade to the kernel packages provided by RHBA-2003:308 (released on 30 October 2003), which already contained a patch correcting this issue.

                                        
                                            #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2003:389. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(12438);
  script_version ("1.31");
  script_cvs_date("Date: 2019/10/25 13:36:10");

  script_cve_id("CVE-2003-0961");
  script_xref(name:"RHSA", value:"2003:389");

  script_name(english:"RHEL 2.1 : kernel (RHSA-2003:389)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated kernel packages are now available that fix a security
vulnerability allowing local users to gain root privileges.

The Linux kernel handles the basic functions of the operating system.

A flaw in bounds checking in the do_brk() function in the Linux kernel
versions 2.4.22 and previous can allow a local attacker to gain root
privileges. This issue is known to be exploitable; an exploit has been
seen in the wild that takes advantage of this vulnerability. The
Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CVE-2003-0961 to this issue.

All users of Red Hat Enterprise Linux 2.1 are advised to upgrade to
these errata packages, which contain a backported security patch that
corrects this vulnerability.

Users of Red Hat Enterprise Linux 3 should upgrade to the kernel
packages provided by RHBA-2003:308 (released on 30 October 2003),
which already contained a patch correcting this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2003-0961"
  );
  # http://rhn.redhat.com/errata/RHBA-2003-308.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHBA-2003:308"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2003:389"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-BOOT");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-enterprise");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-smp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-summit");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:2.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2003/12/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2003/12/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2004/07/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");
include("ksplice.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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^2\.1([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 2.1", "Red Hat " + 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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

if (get_one_kb_item("Host/ksplice/kernel-cves"))
{
  rm_kb_item(name:"Host/uptrack-uname-r");
  cve_list = make_list("CVE-2003-0961");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2003:389");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2003:389";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL2.1", cpu:"i686", reference:"kernel-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"kernel-BOOT-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i686", reference:"kernel-debug-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"kernel-doc-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i686", reference:"kernel-enterprise-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"kernel-headers-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i686", reference:"kernel-smp-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"kernel-source-2.4.9-e.30")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i686", reference:"kernel-summit-2.4.9-e.30")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-BOOT / kernel-debug / kernel-doc / etc");
  }
}