CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
61.3%
An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential …/ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing ‘/’ character, but the alias target filesystem path does have a trailing ‘/’ character.(CVE-2018-19052)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2019-1265.
#
include('compat.inc');
if (description)
{
script_id(127818);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/06");
script_cve_id("CVE-2018-19052");
script_xref(name:"ALAS", value:"2019-1265");
script_name(english:"Amazon Linux AMI : lighttpd (ALAS-2019-1265)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
script_set_attribute(attribute:"description", value:
"An issue was discovered in mod_alias_physical_handler in mod_alias.c
in lighttpd before 1.4.50. There is potential ../ path traversal of a
single directory above an alias target, with a specific mod_alias
configuration where the matched alias lacks a trailing '/' character,
but the alias target filesystem path does have a trailing '/'
character.(CVE-2018-19052)");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2019-1265.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update lighttpd' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
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:N/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-19052");
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:"2018/11/07");
script_set_attribute(attribute:"patch_publication_date", value:"2019/08/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/13");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-fastcgi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-mod_authn_gssapi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-mod_authn_mysql");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-mod_authn_pam");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-mod_geoip");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:lighttpd-mod_mysql_vhost");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"ALA", reference:"lighttpd-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-debuginfo-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-fastcgi-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-mod_authn_gssapi-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-mod_authn_mysql-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-mod_authn_pam-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-mod_geoip-1.4.53-1.36.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"lighttpd-mod_mysql_vhost-1.4.53-1.36.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
else security_warning(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "lighttpd / lighttpd-debuginfo / lighttpd-fastcgi / etc");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
61.3%