Debian: Security Advisory (DLA-3287-1)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.0.893287");
  script_cve_id("CVE-2020-16093", "CVE-2022-37186");
  script_tag(name:"creation_date", value:"2023-01-30 09:58:56 +0000 (Mon, 30 Jan 2023)");
  script_version("2024-02-02T05:06:10+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:10 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:C/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-07-25 21:02:33 +0000 (Mon, 25 Jul 2022)");

  script_name("Debian: Security Advisory (DLA-3287-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 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=DEB10");

  script_xref(name:"Advisory-ID", value:"DLA-3287-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2023/DLA-3287-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/lemonldap-ng");
  script_xref(name:"URL", value:"https://wiki.debian.org/LTS");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'lemonldap-ng' package(s) announced via the DLA-3287-1 advisory.");

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

  script_tag(name:"insight", value:"Two vulnerabilities were found in lemonldap-ng, an OpenID-Connect, CAS and SAML compatible Web-SSO system, that could result in information disclosure or impersonation.

CVE-2020-16093

Maxime Besson discovered that LemonLDAP::NG before 2.0.9 did not check validity of the X.509 certificate by default when connecting to remote LDAP backends, because the default configuration of the Net::LDAPS module for Perl is used.

This update changes the default behavior to require X.509 validation against the distribution bundle /etc/ssl/certs/ca-certificates.crt. Previous behavior can reverted by running /usr/share/lemonldap-ng/bin/lemonldap-ng-cli set ldapVerify none.

If a session backend is set to Apache::Session::LDAP or Apache::Session::Browseable::LDAP, then the complete fix involves upgrading the corresponding Apache::Session module (libapache-session-ldap-perl resp. libapache-session-browseable-perl) to 0.4-1+deb10u1 (or >=0.5) resp. 1.3.0-1+deb10u1 (or >=1.3.8). See related advisories DLA-3284-1 and DLA-3285-1 for details.

CVE-2022-37186

Mickael Bride discovered that under certain conditions the session remained valid on handlers after being destroyed on portal.

For Debian 10 buster, these problems have been fixed in version 2.0.2+ds-7+deb10u8.

We recommend that you upgrade your lemonldap-ng packages.

For the detailed security status of lemonldap-ng please refer to its security tracker page at: [link moved to references]

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references]");

  script_tag(name:"affected", value:"'lemonldap-ng' package(s) on Debian 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 == "DEB10") {

  if(!isnull(res = isdpkgvuln(pkg:"lemonldap-ng", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lemonldap-ng-doc", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lemonldap-ng-fastcgi-server", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lemonldap-ng-handler", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lemonldap-ng-uwsgi-app", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"liblemonldap-ng-common-perl", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"liblemonldap-ng-handler-perl", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"liblemonldap-ng-manager-perl", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"liblemonldap-ng-portal-perl", ver:"2.0.2+ds-7+deb10u8", rls:"DEB10"))) {
    report += res;
  }

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

exit(0);