Ubuntu: Security Advisory (USN-12-1)

# 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("1.3.6.1.4.1.25623.1.1.12.2004.12.1");
  script_tag(name:"creation_date", value:"2022-08-26 07:43:23 +0000 (Fri, 26 Aug 2022)");
  script_version("2023-07-05T05:06:17+0000");
  script_tag(name:"last_modification", value:"2023-07-05 05:06:17 +0000 (Wed, 05 Jul 2023)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");

  script_name("Ubuntu: Security Advisory (USN-12-1)");
  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=UBUNTU4\.10");

  script_xref(name:"Advisory-ID", value:"USN-12-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-12-1");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/379450");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'ppp' package(s) announced via the USN-12-1 advisory.");

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

  script_tag(name:"insight", value:"It has been discovered that ppp does not properly verify certain data
structures used in the CBCP protocol. This vulnerability could allow
an attacker to cause the pppd server to crash due to an invalid memory
access, leading to a denial of service. However, there is no
possibility of code execution or privilege escalation.");

  script_tag(name:"affected", value:"'ppp' package(s) on Ubuntu 4.10.");

  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 == "UBUNTU4.10") {

  if(!isnull(res = isdpkgvuln(pkg:"ppp", ver:"2.4.2+20040428-2ubuntu6.2", rls:"UBUNTU4.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"ppp-dev", ver:"2.4.2+20040428-2ubuntu6.2", rls:"UBUNTU4.10"))) {
    report += res;
  }

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

exit(0);