Vulnerabilities > CVE-2008-1227 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Silc Toolkit

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
silc
CWE-119
nessus
NVD
Published: 2008-03-10
Updated: 2017-08-08

Summary

Stack-based buffer overflow in the silc_fingerprint function in lib/silcutil/silcutil.c in Secure Internet Live Conferencing (SILC) Toolkit 1.1.5, and unspecified earlier versions, allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via long input data. NOTE: some of these details are obtained from third party information.

Vulnerable Configurations

Part Description Count
Application
Silc
6

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SILC-TOOLKIT-5094.NASL
    descriptionThis update of silc-toolkit fixes a stack-based buffer overflow in the silc_fingerprint() function which can possibly exploited to execute arbitrary code remotely. (CVE-2008-1227)
    last seen2020-06-01
    modified2020-06-02
    plugin id31458
    published2008-03-13
    reporterThis script is Copyright (C) 2008-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/31458
    titleopenSUSE 10 Security Update : silc-toolkit (silc-toolkit-5094)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update silc-toolkit-5094.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(31458);
  script_version ("1.8");
  script_cvs_date("Date: 2019/10/25 13:36:33");

  script_cve_id("CVE-2008-1227");

  script_name(english:"openSUSE 10 Security Update : silc-toolkit (silc-toolkit-5094)");
  script_summary(english:"Check for the silc-toolkit-5094 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update of silc-toolkit fixes a stack-based buffer overflow in the
silc_fingerprint() function which can possibly exploited to execute
arbitrary code remotely. (CVE-2008-1227)"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected silc-toolkit packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:silc-toolkit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:silc-toolkit-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:10.3");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/03/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/03/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 Tenable Network Security, Inc.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  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/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE10\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "10.3", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE10.3", reference:"silc-toolkit-1.1.2-14.2") ) flag++;
if ( rpm_check(release:"SUSE10.3", reference:"silc-toolkit-devel-1.1.2-14.2") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "silc-toolkit");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200804-27.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200804-27 (SILC: Multiple vulnerabilities) Nathan G. Grennan reported a boundary error in SILC Toolkit within the silc_fingerprint() function in the file lib/silcutil/silcutil.c when passing overly long data, resulting in a stack-based buffer overflow (CVE-2008-1227). A vulnerability has been reported in SILC Server which is caused due to an error in the handling of
    last seen2020-06-01
    modified2020-06-02
    plugin id32073
    published2008-04-28
    reporterThis script is Copyright (C) 2008-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/32073
    titleGLSA-200804-27 : SILC: Multiple vulnerabilities
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200804-27.
#
# The advisory text is Copyright (C) 2001-2016 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(32073);
  script_version("1.16");
  script_cvs_date("Date: 2019/08/02 13:32:44");

  script_cve_id("CVE-2008-1227", "CVE-2008-1429", "CVE-2008-1552");
  script_xref(name:"GLSA", value:"200804-27");

  script_name(english:"GLSA-200804-27 : SILC: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200804-27
(SILC: Multiple vulnerabilities)

    Nathan G. Grennan reported a boundary error in SILC Toolkit
    within the silc_fingerprint() function in the file
    lib/silcutil/silcutil.c when passing overly long data, resulting in a
    stack-based buffer overflow (CVE-2008-1227).
    A vulnerability
    has been reported in SILC Server which is caused due to an error in the
    handling of 'NEW_CLIENT' packets that do not contain a nickname
    (CVE-2008-1429).
    Ariel Waissbein, Pedro Varangot, Martin
    Mizrahi, Oren Isacson, Carlos Garcia, and Ivan Arce of Core Security
    Technologies reported that SILC Client, Server, and Toolkit contain a
    vulnerability in the silc_pkcs1_decode() function in the silccrypt
    library (silcpkcs1.c), resulting in an integer underflow, signedness
    error, and a buffer overflow (CVE-2008-1552).
  
Impact :

    A remote attacker could exploit these vulnerabilities to cause a Denial
    of Service or execute arbitrary code with the privileges of the user
    running the application.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200804-27"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All SILC Toolkit users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-im/silc-toolkit-1.1.7'
    All SILC Client users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-im/silc-client-1.1.4'
    All SILC Server users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-im/silc-server-1.1.2'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_cwe_id(119, 189);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:silc-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:silc-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:silc-toolkit");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/04/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/04/28");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-im/silc-server", unaffected:make_list("ge 1.1.2"), vulnerable:make_list("lt 1.1.2"))) flag++;
if (qpkg_check(package:"net-im/silc-toolkit", unaffected:make_list("ge 1.1.7"), vulnerable:make_list("lt 1.1.7"))) flag++;
if (qpkg_check(package:"net-im/silc-client", unaffected:make_list("ge 1.1.4"), vulnerable:make_list("lt 1.1.4"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "SILC");
}
  • NASL familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2008-158.NASL
    descriptionA vulnerability was found in the SILC toolkit before version 1.1.5 that allowed a remote attacker to cause a denial of service (crash), or possibly execute arbitrary code via long input data (CVE-2008-1227). A vulnerability was found in the SILC toolkit before version 1.1.7 that allowed a remote attacker to execute arbitrary code via a crafted PKCS#2 message (CVE-2008-1552). The updated packages have been patched to correct these issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id36632
    published2009-04-23
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/36632
    titleMandriva Linux Security Advisory : silc-toolkit (MDVSA-2008:158)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2008:158. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(36632);
  script_version ("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:50");

  script_cve_id("CVE-2008-1227", "CVE-2008-1552");
  script_xref(name:"MDVSA", value:"2008:158");

  script_name(english:"Mandriva Linux Security Advisory : silc-toolkit (MDVSA-2008:158)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A vulnerability was found in the SILC toolkit before version 1.1.5
that allowed a remote attacker to cause a denial of service (crash),
or possibly execute arbitrary code via long input data
(CVE-2008-1227).

A vulnerability was found in the SILC toolkit before version 1.1.7
that allowed a remote attacker to execute arbitrary code via a crafted
PKCS#2 message (CVE-2008-1552).

The updated packages have been patched to correct these issues."
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_cwe_id(119, 189);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64silc-1.1_2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64silcclient-1.1_2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libsilc-1.1_2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libsilcclient-1.1_2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:silc-toolkit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:silc-toolkit-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2008.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/07/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/04/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2009-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2008.0", cpu:"x86_64", reference:"lib64silc-1.1_2-1.1.2-2.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", cpu:"x86_64", reference:"lib64silcclient-1.1_2-1.1.2-2.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", cpu:"i386", reference:"libsilc-1.1_2-1.1.2-2.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", cpu:"i386", reference:"libsilcclient-1.1_2-1.1.2-2.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", reference:"silc-toolkit-1.1.2-2.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", reference:"silc-toolkit-devel-1.1.2-2.1mdv2008.0", yank:"mdv")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References