Vulnerabilities > CVE-2008-4636 - OS Command Injection vulnerability in Suse Yast2-Backup 2.14.2/2.16.6

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
suse
CWE-78
nessus

Summary

yast2-backup 2.14.2 through 2.16.6 on SUSE Linux and Novell Linux allows local users to gain privileges via shell metacharacters in filenames used by the backup process.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
  • Command Delimiters
    An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or a blacklist input validation, as opposed to whitelist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or blacklist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
  • Exploiting Multiple Input Interpretation Layers
    An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
  • Argument Injection
    An attacker changes the behavior or state of a targeted application through injecting data or command syntax through the targets use of non-validated and non-filtered arguments of exposed services or methods.
  • OS Command Injection
    In this type of an attack, an adversary injects operating system commands into existing application functions. An application that uses untrusted input to build command strings is vulnerable. An adversary can leverage OS command injection in an application to elevate privileges, execute arbitrary commands and compromise the underlying operating system.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_YAST2-BACKUP-5760.NASL
    descriptionThis updated of yast2-backup fixes a sellcode injection vulnerability and improves handling of symlinks for the backup process. (CVE-2008-4636)
    last seen2020-06-01
    modified2020-06-02
    plugin id41605
    published2009-09-24
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/41605
    titleSuSE 10 Security Update : yast2-backup (ZYPP Patch Number 5760)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The text description of this plugin is (C) Novell, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(41605);
      script_version ("1.10");
      script_cvs_date("Date: 2019/10/25 13:36:33");
    
      script_cve_id("CVE-2008-4636");
    
      script_name(english:"SuSE 10 Security Update : yast2-backup (ZYPP Patch Number 5760)");
      script_summary(english:"Checks rpm output for the updated package");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote SuSE 10 host is missing a security-related patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This updated of yast2-backup fixes a sellcode injection vulnerability
    and improves handling of symlinks for the backup process.
    (CVE-2008-4636)"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"http://support.novell.com/security/cve/CVE-2008-4636.html"
      );
      script_set_attribute(attribute:"solution", value:"Apply ZYPP patch number 5760.");
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
      script_cwe_id(20);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:suse:suse_linux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2008/11/10");
      script_set_attribute(attribute:"plugin_publication_date", value:"2009/09/24");
      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:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
    
      exit(0);
    }
    
    
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) exit(0, "Local checks are not enabled.");
    if (!get_kb_item("Host/SuSE/release")) exit(0, "The host is not running SuSE.");
    if (!get_kb_item("Host/SuSE/rpm-list")) exit(1, "Could not obtain the list of installed packages.");
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) exit(1, "Failed to determine the architecture type.");
    if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") exit(1, "Local checks for SuSE 10 on the '"+cpu+"' architecture have not been implemented.");
    
    
    flag = 0;
    if (rpm_check(release:"SLED10", sp:2, reference:"yast2-backup-2.13.6-0.1")) flag++;
    if (rpm_check(release:"SLES10", sp:2, reference:"yast2-backup-2.13.6-0.1")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else exit(0, "The host is not affected.");
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_YAST2-BACKUP-5739.NASL
    descriptionThis updated of yast2-backup fixes a shellcode injection vulnerability and improves handling of symlinks for the backup process. (CVE-2008-4636)
    last seen2020-06-01
    modified2020-06-02
    plugin id34962
    published2008-11-25
    reporterThis script is Copyright (C) 2008-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/34962
    titleSuSE 10 Security Update : yast2-backup (ZYPP Patch Number 5739)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The text description of this plugin is (C) Novell, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(34962);
      script_version ("1.16");
      script_cvs_date("Date: 2019/10/25 13:36:33");
    
      script_cve_id("CVE-2008-4636");
    
      script_name(english:"SuSE 10 Security Update : yast2-backup (ZYPP Patch Number 5739)");
      script_summary(english:"Checks rpm output for the updated package");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote SuSE 10 host is missing a security-related patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This updated of yast2-backup fixes a shellcode injection vulnerability
    and improves handling of symlinks for the backup process.
    (CVE-2008-4636)"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"http://support.novell.com/security/cve/CVE-2008-4636.html"
      );
      script_set_attribute(attribute:"solution", value:"Apply ZYPP patch number 5739.");
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
      script_cwe_id(20);
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:suse:suse_linux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2008/10/29");
      script_set_attribute(attribute:"plugin_publication_date", value:"2008/11/25");
      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/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
    
      exit(0);
    }
    
    
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) exit(0, "Local checks are not enabled.");
    if (!get_kb_item("Host/SuSE/release")) exit(0, "The host is not running SuSE.");
    if (!get_kb_item("Host/SuSE/rpm-list")) exit(1, "Could not obtain the list of installed packages.");
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) exit(1, "Failed to determine the architecture type.");
    if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") exit(1, "Local checks for SuSE 10 on the '"+cpu+"' architecture have not been implemented.");
    
    
    flag = 0;
    if (rpm_check(release:"SLED10", sp:1, reference:"yast2-backup-2.13.6-0.1")) flag++;
    if (rpm_check(release:"SLES10", sp:1, reference:"yast2-backup-2.13.6-0.1")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else exit(0, "The host is not affected.");
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE9_12279.NASL
    descriptionThis updated of yast2-backup fixes a sellcode injection vulnerability and improves handling of symlinks for the backup process. (CVE-2008-4636)
    last seen2020-06-01
    modified2020-06-02
    plugin id41252
    published2009-09-24
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/41252
    titleSuSE9 Security Update : yast2-backup (YOU Patch Number 12279)