CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
94.4%
Several vulnerabilities were discovered in Subversion, a version control system. The Common Vulnerabilities and Exposures project identifies the following problems :
CVE-2016-2167 Daniel Shahaf and James McCoy discovered that an implementation error in the authentication against the Cyrus SASL library would permit a remote user to specify a realm string which is a prefix of the expected realm string and potentially allowing a user to authenticate using the wrong realm.
CVE-2016-2168 Ivan Zhakov of VisualSVN discovered a remotely triggerable denial of service vulnerability in the mod_authz_svn module during COPY or MOVE authorization check. An authenticated remote attacker could take advantage of this flaw to cause a denial of service (Subversion server crash) via COPY or MOVE requests with specially crafted header.
#%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-3561. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(90808);
script_version("2.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2016-2167", "CVE-2016-2168");
script_xref(name:"DSA", value:"3561");
script_name(english:"Debian DSA-3561-1 : subversion - security update");
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:
"Several vulnerabilities were discovered in Subversion, a version
control system. The Common Vulnerabilities and Exposures project
identifies the following problems :
- CVE-2016-2167
Daniel Shahaf and James McCoy discovered that an
implementation error in the authentication against the
Cyrus SASL library would permit a remote user to specify
a realm string which is a prefix of the expected realm
string and potentially allowing a user to authenticate
using the wrong realm.
- CVE-2016-2168
Ivan Zhakov of VisualSVN discovered a remotely
triggerable denial of service vulnerability in the
mod_authz_svn module during COPY or MOVE authorization
check. An authenticated remote attacker could take
advantage of this flaw to cause a denial of service
(Subversion server crash) via COPY or MOVE requests with
specially crafted header."
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-2167"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-2168"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/subversion"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2016/dsa-3561"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the subversion packages.
For the stable distribution (jessie), these problems have been fixed
in version 1.8.10-6+deb8u4."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:subversion");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"patch_publication_date", value:"2016/04/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/02");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
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:"8.0", prefix:"libapache2-mod-svn", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libapache2-svn", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libsvn-dev", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libsvn-doc", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libsvn-java", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libsvn-perl", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libsvn-ruby1.8", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libsvn1", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"python-subversion", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"ruby-svn", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"subversion", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"subversion-dbg", reference:"1.8.10-6+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"subversion-tools", reference:"1.8.10-6+deb8u4")) 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");
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
94.4%