Megyer Laszlo report on Bugtraq that the cfingerd daemon as distributed with Debian GNU/Linux 2.2 was not careful in its logging code. By combining this with an off-by-one error in the code that copied the username from an ident response cfingerd could be exploited by a remote user. Since cfingerd does not drop its root privileges until after it has determined which user to finger an attacker can gain root privileges.
#%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-049. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(14886);
script_version("1.19");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2001-0609");
script_bugtraq_id(2576);
script_xref(name:"DSA", value:"049");
script_name(english:"Debian DSA-049-1 : cfingerd");
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:
"Megyer Laszlo report on Bugtraq that the cfingerd daemon as
distributed with Debian GNU/Linux 2.2 was not careful in its logging
code. By combining this with an off-by-one error in the code that
copied the username from an ident response cfingerd could be
exploited by a remote user. Since cfingerd does not drop its root
privileges until after it has determined which user to finger an
attacker can gain root privileges."
);
script_set_attribute(
attribute:"see_also",
value:"http://www.debian.org/security/2001/dsa-049"
);
script_set_attribute(
attribute:"solution",
value:
"This has been fixed in version 1.4.1-1.1, and we recommend that you
upgrade your cfingerd package immediately.
Note: this advisory was previously posted as DSA-048-1 by mistake."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
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:cfingerd");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:2.2");
script_set_attribute(attribute:"patch_publication_date", value:"2001/04/19");
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:"2.2", prefix:"cfingerd", reference:"1.4.1-1.1")) 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");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | cfingerd | p-cpe:/a:debian:debian_linux:cfingerd |
debian | debian_linux | 2.2 | cpe:/o:debian:debian_linux:2.2 |