4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.021 Low
EPSS
Percentile
89.3%
It was discovered that PuTTY’s terminal emulator did not properly validate the parameter to the ECH (erase characters) control sequence, allowing a denial of service and possibly remote code execution.
For the oldoldstable distribution (squeeze), this problem has been fixed in version 0.60+2010-02-20-1+squeeze4.
For the oldstable (wheezy) and stable (jessie) distributions, this problem will be fixed soon.
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-347-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(87068);
script_version("2.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2015-5309");
script_name(english:"Debian DLA-347-1 : putty security update");
script_summary(english:"Checks dpkg output for the updated packages.");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"It was discovered that PuTTY's terminal emulator did not properly
validate the parameter to the ECH (erase characters) control sequence,
allowing a denial of service and possibly remote code execution.
For the oldoldstable distribution (squeeze), this problem has been
fixed in version 0.60+2010-02-20-1+squeeze4.
For the oldstable (wheezy) and stable (jessie) distributions, this
problem will be fixed soon.
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/2015/11/msg00008.html"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze-lts/putty"
);
script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/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:pterm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:putty-tools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"patch_publication_date", value:"2015/11/24");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/11/30");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2021 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:"6.0", prefix:"pterm", reference:"0.60+2010-02-20-1+squeeze4")) flag++;
if (deb_check(release:"6.0", prefix:"putty", reference:"0.60+2010-02-20-1+squeeze4")) flag++;
if (deb_check(release:"6.0", prefix:"putty-doc", reference:"0.60+2010-02-20-1+squeeze4")) flag++;
if (deb_check(release:"6.0", prefix:"putty-tools", reference:"0.60+2010-02-20-1+squeeze4")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | pterm | p-cpe:/a:debian:debian_linux:pterm |
debian | debian_linux | putty | p-cpe:/a:debian:debian_linux:putty |
debian | debian_linux | putty-doc | p-cpe:/a:debian:debian_linux:putty-doc |
debian | debian_linux | putty-tools | p-cpe:/a:debian:debian_linux:putty-tools |
debian | debian_linux | 6.0 | cpe:/o:debian:debian_linux:6.0 |