3.6 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:P/A:P
0.0004 Low
EPSS
Percentile
10.2%
It was found [1] that the Capture::Tiny module, provided by the perl-Capture-Tiny package, used the File::temp::tmpnam module to generate temporary files :
./lib/Capture/Tiny.pm: $stash->{flag_files}{$which} = scalar tmpnam();
This module makes use of the mktemp() function when called in the scalar context, which creates significantly more predictable temporary files. Additionally, the temporary file is created with world-writable (0666) permission. A local attacker could use this flaw to perform a symbolic link attack, overwriting arbitrary files accessible to a program using the Capture::Tiny module.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2014-358.
#
include("compat.inc");
if (description)
{
script_id(78301);
script_version("1.4");
script_cvs_date("Date: 2018/04/18 15:09:35");
script_cve_id("CVE-2014-1875");
script_xref(name:"ALAS", value:"2014-358");
script_name(english:"Amazon Linux AMI : perl-Capture-Tiny (ALAS-2014-358)");
script_summary(english:"Checks rpm output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux AMI host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"It was found [1] that the Capture::Tiny module, provided by the
perl-Capture-Tiny package, used the File::temp::tmpnam module to
generate temporary files :
./lib/Capture/Tiny.pm: $stash->{flag_files}{$which} = scalar tmpnam();
This module makes use of the mktemp() function when called in the
scalar context, which creates significantly more predictable temporary
files. Additionally, the temporary file is created with world-writable
(0666) permission. A local attacker could use this flaw to perform a
symbolic link attack, overwriting arbitrary files accessible to a
program using the Capture::Tiny module."
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2014-358.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update perl-Capture-Tiny' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:P");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perl-Capture-Tiny");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2014/06/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/10/12");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2014-2018 Tenable Network Security, Inc.");
script_family(english:"Amazon Linux Local Security Checks");
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:"perl-Capture-Tiny-0.24-1.5.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
else security_note(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "perl-Capture-Tiny");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | perl-capture-tiny | p-cpe:/a:amazon:linux:perl-capture-tiny |
amazon | linux | cpe:/o:amazon:linux |