Debian DLA-2115-2 : proftpd-dfsg regression update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2115-2. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(133876);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/20");

  script_cve_id("CVE-2020-9273");

  script_name(english:"Debian DLA-2115-2 : proftpd-dfsg regression update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It was discovered that there was a regression in a previous fix for a
use-after-free vulnerability in the proftpd-dfsg FTP server.

Exploitation of the original vulnerability within the memory pool
handling could have allowed a remote attacker to execute arbitrary
code on the affected system. However, the fix that was released in
proftpd-dfsg version 1.3.5e+r1.3.5-2+deb8u6 had a regression around
the handling of log formatting.

For more information, please see :

https://github.com/proftpd/proftpd/issues/903

For Debian 8 'Jessie', this issue has been fixed in proftpd-dfsg
version 1.3.5e+r1.3.5-2+deb8u7.

We recommend that you upgrade your proftpd-dfsg packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://github.com/proftpd/proftpd/issues/903");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2020/03/msg00002.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/proftpd-dfsg");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-9273");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-basic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-mod-geoip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-mod-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-mod-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-mod-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-mod-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-mod-sqlite");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"proftpd-basic", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-dev", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-doc", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-mod-geoip", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-mod-ldap", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-mod-mysql", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-mod-odbc", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-mod-pgsql", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;
if (deb_check(release:"8.0", prefix:"proftpd-mod-sqlite", reference:"1.3.5e+r1.3.5-2+deb8u7")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");