Ubuntu: Security Advisory (USN-6736-2)

# SPDX-FileCopyrightText: 2024 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("1.3.6.1.4.1.25623.1.1.12.2024.6736.2");
  script_cve_id("CVE-2016-9840", "CVE-2016-9841", "CVE-2018-25032", "CVE-2022-37434");
  script_tag(name:"creation_date", value:"2024-05-24 04:08:05 +0000 (Fri, 24 May 2024)");
  script_version("2024-05-24T19:38:34+0000");
  script_tag(name:"last_modification", value:"2024-05-24 19:38:34 +0000 (Fri, 24 May 2024)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-08-11 18:38:23 +0000 (Thu, 11 Aug 2022)");

  script_name("Ubuntu: Security Advisory (USN-6736-2)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2024 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=UBUNTU24\.04\ LTS");

  script_xref(name:"Advisory-ID", value:"USN-6736-2");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-6736-2");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'klibc' package(s) announced via the USN-6736-2 advisory.");

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

  script_tag(name:"insight", value:"USN-6736-1 fixed vulnerabilities in klibc. This update provides the
corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

 It was discovered that zlib, vendored in klibc, incorrectly handled pointer
 arithmetic. An attacker could use this issue to cause klibc to crash or to
 possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)

 Danilo Ramos discovered that zlib, vendored in klibc, incorrectly handled
 memory when performing certain deflating operations. An attacker could use
 this issue to cause klibc to crash or to possibly execute arbitrary code.
 (CVE-2018-25032)

 Evgeny Legerov discovered that zlib, vendored in klibc, incorrectly handled
 memory when performing certain inflate operations. An attacker could use
 this issue to cause klibc to crash or to possibly execute arbitrary code.
 (CVE-2022-37434)");

  script_tag(name:"affected", value:"'klibc' package(s) on Ubuntu 24.04.");

  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 == "UBUNTU24.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"klibc-utils", ver:"2.0.13-4ubuntu0.1", rls:"UBUNTU24.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libklibc", ver:"2.0.13-4ubuntu0.1", rls:"UBUNTU24.04 LTS"))) {
    report += res;
  }

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

exit(0);