Ubuntu: Security Advisory (USN-334-1)

# SPDX-FileCopyrightText: 2022 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.1.12.2006.334.1");
  script_cve_id("CVE-2006-3083", "CVE-2006-3084");
  script_tag(name:"creation_date", value:"2022-08-26 07:43:23 +0000 (Fri, 26 Aug 2022)");
  script_version("2024-02-02T05:06:09+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:09 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");

  script_name("Ubuntu: Security Advisory (USN-334-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Ubuntu Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/ubuntu_linux", "ssh/login/packages", re:"ssh/login/release=UBUNTU(5\.04|5\.10|6\.06\ LTS)");

  script_xref(name:"Advisory-ID", value:"USN-334-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-334-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'krb5' package(s) announced via the USN-334-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"Michael Calmer and Marcus Meissner discovered that several krb5 tools
did not check the return values from setuid() system calls. On systems
that have configured user process limits, it may be possible for an
attacker to cause setuid() to fail via resource starvation. In that
situation, the tools will not reduce their privilege levels, and will
continue operation as the root user.

By default, Ubuntu does not ship with user process limits.

Please note that these packages are not officially supported by Ubuntu
(they are in the 'universe' component of the archive).");

  script_tag(name:"affected", value:"'krb5' package(s) on Ubuntu 5.04, Ubuntu 5.10, Ubuntu 6.06.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "UBUNTU5.04") {

  if(!isnull(res = isdpkgvuln(pkg:"krb5-clients", ver:"1.3.6-1ubuntu0.2", rls:"UBUNTU5.04"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-ftpd", ver:"1.3.6-1ubuntu0.2", rls:"UBUNTU5.04"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-rsh-server", ver:"1.3.6-1ubuntu0.2", rls:"UBUNTU5.04"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-user", ver:"1.3.6-1ubuntu0.2", rls:"UBUNTU5.04"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

if(release == "UBUNTU5.10") {

  if(!isnull(res = isdpkgvuln(pkg:"krb5-clients", ver:"1.3.6-4ubuntu0.1", rls:"UBUNTU5.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-ftpd", ver:"1.3.6-4ubuntu0.1", rls:"UBUNTU5.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-rsh-server", ver:"1.3.6-4ubuntu0.1", rls:"UBUNTU5.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-user", ver:"1.3.6-4ubuntu0.1", rls:"UBUNTU5.10"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

if(release == "UBUNTU6.06 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"krb5-clients", ver:"1.4.3-5ubuntu0.1", rls:"UBUNTU6.06 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-ftpd", ver:"1.4.3-5ubuntu0.1", rls:"UBUNTU6.06 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-rsh-server", ver:"1.4.3-5ubuntu0.1", rls:"UBUNTU6.06 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"krb5-user", ver:"1.4.3-5ubuntu0.1", rls:"UBUNTU6.06 LTS"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);