A set of problems have been discovered in Hylafax, a flexible client/server fax software distributed with many GNU/Linux distributions. Quoting SecurityFocus the problems are in detail :
A format string vulnerability makes it possible for users to potentially execute arbitrary code on some implementations. Due to insufficient checking of input, it’s possible to execute a format string attack. Since this only affects systems with the faxrm and faxalter programs installed setuid, Debian is not vulnerable.
A buffer overflow has been reported in Hylafax. A malicious fax transmission may include a long scan line that will overflow a memory buffer, corrupting adjacent memory. An exploit may result in a denial of service condition, or possibly the execution of arbitrary code with root privileges.
A format string vulnerability has been discovered in faxgetty. Incoming fax messages include a Transmitting Subscriber Identification (TSI) string, used to identify the sending fax machine. Hylafax uses this data as part of a format string without properly sanitizing the input. Malicious fax data may cause the server to crash, resulting in a denial of service condition.
Marcin Dawcewicz discovered a format string vulnerability in hfaxd, which will crash hfaxd under certain circumstances. Since Debian doesn’t have hfaxd installed setuid root, this problem cannot directly lead into a vulnerability. This has been fixed by Darren Nickerson, which was already present in newer versions, but not in the potato version.
These problems have been fixed in version 4.0.2-14.3 for the old stable distribution (potato), in version 4.1.1-1.1 for the current stable distribution (woody) and in version 4.1.2-2.1 for the unstable distribution (sid).
#%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-148. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(14985);
script_version("1.21");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2001-0387", "CVE-2001-1034", "CVE-2002-1049", "CVE-2002-1050");
script_bugtraq_id(3357, 5348, 5349);
script_xref(name:"DSA", value:"148");
script_name(english:"Debian DSA-148-1 : hylafax - buffer overflows and format string vulnerabilities");
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 set of problems have been discovered in Hylafax, a flexible
client/server fax software distributed with many GNU/Linux
distributions. Quoting SecurityFocus the problems are in detail :
- A format string vulnerability makes it possible for
users to potentially execute arbitrary code on some
implementations. Due to insufficient checking of input,
it's possible to execute a format string attack. Since
this only affects systems with the faxrm and faxalter
programs installed setuid, Debian is not vulnerable.
- A buffer overflow has been reported in Hylafax. A
malicious fax transmission may include a long scan line
that will overflow a memory buffer, corrupting adjacent
memory. An exploit may result in a denial of service
condition, or possibly the execution of arbitrary code
with root privileges.
- A format string vulnerability has been discovered in
faxgetty. Incoming fax messages include a Transmitting
Subscriber Identification (TSI) string, used to identify
the sending fax machine. Hylafax uses this data as part
of a format string without properly sanitizing the
input. Malicious fax data may cause the server to crash,
resulting in a denial of service condition.
- Marcin Dawcewicz discovered a format string
vulnerability in hfaxd, which will crash hfaxd under
certain circumstances. Since Debian doesn't have hfaxd
installed setuid root, this problem cannot directly lead
into a vulnerability. This has been fixed by Darren
Nickerson, which was already present in newer versions,
but not in the potato version.
These problems have been fixed in version 4.0.2-14.3 for the old
stable distribution (potato), in version 4.1.1-1.1 for the current
stable distribution (woody) and in version 4.1.2-2.1 for the unstable
distribution (sid)."
);
script_set_attribute(
attribute:"see_also",
value:"http://www.debian.org/security/2002/dsa-148"
);
script_set_attribute(attribute:"solution", value:"Upgrade the hylafax packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:hylafax");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:2.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.0");
script_set_attribute(attribute:"patch_publication_date", value:"2002/08/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2004/09/29");
script_set_attribute(attribute:"vuln_publication_date", value:"2001/04/12");
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:"hylafax-client", reference:"4.0.2-14.3")) flag++;
if (deb_check(release:"2.2", prefix:"hylafax-doc", reference:"4.0.2-14.3")) flag++;
if (deb_check(release:"2.2", prefix:"hylafax-server", reference:"4.0.2-14.3")) flag++;
if (deb_check(release:"3.0", prefix:"hylafax-client", reference:"4.1.1-1.1")) flag++;
if (deb_check(release:"3.0", prefix:"hylafax-doc", reference:"4.1.1-1.1")) flag++;
if (deb_check(release:"3.0", prefix:"hylafax-server", reference:"4.1.1-1.1")) 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 | hylafax | p-cpe:/a:debian:debian_linux:hylafax |
debian | debian_linux | 2.2 | cpe:/o:debian:debian_linux:2.2 |
debian | debian_linux | 3.0 | cpe:/o:debian:debian_linux:3.0 |