2.1 Low
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
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%
A minor security issue and a severe packaging bug have been fixed in tinyproxy, a lightweight http proxy daemon.
CVE-2017-11747
main.c in Tinyproxy created a /var/run/tinyproxy/tinyproxy.pid file after dropping privileges to a non-root account, which might have allowed local users to kill arbitrary processes by leveraging access to this non-root account for tinyproxy.pid modification before a root script executed a ‘kill cat /run/tinyproxy/tinyproxy.pid
’ command.
OTHER
Furthermore, a severe flaw had been discovered by Tim Duesterhus in Debian’s init script for tinyproxy. With the tiny.conf configuration file having the PidFile option removed, the next run of logrotate (if installed) would have changed the owner of the system’s base directory (‘/’) to tinyproxy:tinyproxy.
For Debian 8 ‘Jessie’, this problem has been fixed in version 1.8.3-3+deb8u1. These fixes were prepared by Mike Gabriel.
We recommend that you upgrade your tinyproxy 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.
#%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-2163-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(135098);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/20");
script_cve_id("CVE-2017-11747");
script_name(english:"Debian DLA-2163-1 : tinyproxy security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
script_set_attribute(attribute:"description", value:
"A minor security issue and a severe packaging bug have been fixed in
tinyproxy, a lightweight http proxy daemon.
CVE-2017-11747
main.c in Tinyproxy created a /var/run/tinyproxy/tinyproxy.pid file
after dropping privileges to a non-root account, which might have
allowed local users to kill arbitrary processes by leveraging access
to this non-root account for tinyproxy.pid modification before a root
script executed a 'kill `cat /run/tinyproxy/tinyproxy.pid`' command.
OTHER
Furthermore, a severe flaw had been discovered by Tim Duesterhus in
Debian's init script for tinyproxy. With the tiny.conf configuration
file having the PidFile option removed, the next run of logrotate (if
installed) would have changed the owner of the system's base directory
('/') to tinyproxy:tinyproxy.
For Debian 8 'Jessie', this problem has been fixed in version
1.8.3-3+deb8u1. These fixes were prepared by Mike Gabriel.
We recommend that you upgrade your tinyproxy 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://lists.debian.org/debian-lts-announce/2020/03/msg00037.html");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/tinyproxy");
script_set_attribute(attribute:"solution", value:
"Upgrade the affected tinyproxy 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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-11747");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/30");
script_set_attribute(attribute:"patch_publication_date", value:"2020/03/31");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/02");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tinyproxy");
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:"tinyproxy", reference:"1.8.3-3+deb8u1")) 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");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | tinyproxy | p-cpe:/a:debian:debian_linux:tinyproxy |
debian | debian_linux | 8.0 | cpe:/o:debian:debian_linux:8.0 |
2.1 Low
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
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%