CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
5.1%
A problem has been discovered in nullmailer, a simple relay-only mail transport agent for hosts that relay mail to a fixed set of smart relays. When a mail is to be delivered locally to a user that doesn’t exist, nullmailer tries to deliver it, discovers a user unknown error and stops delivering. Unfortunately, it stops delivering entirely, not only this mail. Hence, it’s very easy to craft a denial of service.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-198. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(15035);
script_version("1.18");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2002-1313");
script_bugtraq_id(6193);
script_xref(name:"DSA", value:"198");
script_name(english:"Debian DSA-198-1 : nullmailer - denial of service");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"A problem has been discovered in nullmailer, a simple relay-only mail
transport agent for hosts that relay mail to a fixed set of smart
relays. When a mail is to be delivered locally to a user that doesn't
exist, nullmailer tries to deliver it, discovers a user unknown error
and stops delivering. Unfortunately, it stops delivering entirely, not
only this mail. Hence, it's very easy to craft a denial of service."
);
script_set_attribute(
attribute:"see_also",
value:"http://www.debian.org/security/2002/dsa-198"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the nullmailer package.
This problem has been fixed in version 1.00RC5-16.1woody2 for the
current stable distribution (woody) and in version 1.00RC5-17 for the
unstable distribution (sid). The old stable distribution (potato) does
not contain a nullmailer package."
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nullmailer");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.0");
script_set_attribute(attribute:"patch_publication_date", value:"2002/11/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2004/09/29");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2004-2021 Tenable Network Security, Inc.");
script_family(english:"Debian Local Security Checks");
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:"3.0", prefix:"nullmailer", reference:"1.00RC5-16.1woody2")) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:deb_report_get());
else security_note(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");