CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
94.0%
Antonio Morales discovered an use-after-free flaw in the memory pool allocator in ProFTPD, a powerful modular FTP/SFTP/FTPS server.
Interrupting current data transfers can corrupt the ProFTPD memory pool, leading to denial of service, or potentially the execution of arbitrary code.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4635. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(134095);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/20");
script_cve_id("CVE-2020-9273");
script_xref(name:"DSA", value:"4635");
script_name(english:"Debian DSA-4635-1 : proftpd-dfsg - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"Antonio Morales discovered an use-after-free flaw in the memory pool
allocator in ProFTPD, a powerful modular FTP/SFTP/FTPS server.
Interrupting current data transfers can corrupt the ProFTPD memory
pool, leading to denial of service, or potentially the execution of
arbitrary code.");
script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=951800");
# https://security-tracker.debian.org/tracker/source-package/proftpd-dfsg
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a98522a3");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/proftpd-dfsg");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/proftpd-dfsg");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2020/dsa-4635");
script_set_attribute(attribute:"solution", value:
"Upgrade the proftpd-dfsg packages.
For the oldstable distribution (stretch), this problem has been fixed
in version 1.3.5b-4+deb9u4.
For the stable distribution (buster), this problem has been fixed in
version 1.3.6-4+deb10u4.");
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:"2020/02/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:proftpd-dfsg");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
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:"10.0", prefix:"proftpd-basic", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-dev", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-doc", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-geoip", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-ldap", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-mysql", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-odbc", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-pgsql", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-snmp", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"10.0", prefix:"proftpd-mod-sqlite", reference:"1.3.6-4+deb10u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-basic", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-dev", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-doc", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-mod-geoip", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-mod-ldap", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-mod-mysql", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-mod-odbc", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-mod-pgsql", reference:"1.3.5b-4+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"proftpd-mod-sqlite", reference:"1.3.5b-4+deb9u4")) 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");
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
94.0%