Debian: Security Advisory (DSA-5023-1)

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.705023");
  script_cve_id("CVE-2021-42717");
  script_tag(name:"creation_date", value:"2021-12-20 09:56:46 +0000 (Mon, 20 Dec 2021)");
  script_version("2024-02-02T05:06:07+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-12-10 01:36:23 +0000 (Fri, 10 Dec 2021)");

  script_name("Debian: Security Advisory (DSA-5023-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB(10|11)");

  script_xref(name:"Advisory-ID", value:"DSA-5023-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2021/DSA-5023-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-5023");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/modsecurity-apache");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'modsecurity-apache' package(s) announced via the DSA-5023-1 advisory.");

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

  script_tag(name:"insight", value:"It was discovered that modsecurity-apache, an Apache module to tighten the Web application security, does not properly handles excessively nested JSON objects, which could result in denial of service. The update introduces a new SecRequestBodyJsonDepthLimit option to limit the maximum request body JSON parsing depth which ModSecurity will accept (defaults to 10000).

For the oldstable distribution (buster), this problem has been fixed in version 2.9.3-1+deb10u1.

For the stable distribution (bullseye), this problem has been fixed in version 2.9.3-3+deb11u1.

We recommend that you upgrade your modsecurity-apache packages.

For the detailed security status of modsecurity-apache please refer to its security tracker page at: [link moved to references]");

  script_tag(name:"affected", value:"'modsecurity-apache' package(s) on Debian 10, Debian 11.");

  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 == "DEB10") {

  if(!isnull(res = isdpkgvuln(pkg:"libapache2-mod-security2", ver:"2.9.3-1+deb10u1", rls:"DEB10"))) {
    report += res;
  }

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

if(release == "DEB11") {

  if(!isnull(res = isdpkgvuln(pkg:"libapache2-mod-security2", ver:"2.9.3-3+deb11u1", rls:"DEB11"))) {
    report += res;
  }

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

exit(0);