Vulnerabilities > CVE-2010-4226 - Link Following vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
NONE Summary
cpio, as used in build 2007.05.10, 2010.07.28, and possibly other versions, allows remote attackers to overwrite arbitrary files via a symlink within an RPM package archive.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 | |
| OS | 2 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Symlink Attack An attacker positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name. The endpoint file may be either output or input. If the file is output, the result is that the endpoint is modified, instead of a file at the intended location. Modifications to the endpoint file may include appending, overwriting, corrupting, changing permissions, or other modifications. In some variants of this attack the attacker may be able to control the change to a file while in other cases they cannot. The former is especially damaging since the attacker may be able to grant themselves increased privileges or insert false information, but the latter can also be damaging as it can expose sensitive information or corrupt or destroy vital system or application files. Alternatively, the endpoint file may serve as input to the targeted application. This can be used to feed malformed input into the target or to cause the target to process different information, possibly allowing the attacker to control the actions of the target or to cause the target to expose information to the attacker. Moreover, the actions taken on the endpoint file are undertaken with the permissions of the targeted user or application, which may exceed the permissions that the attacker would normally have.
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Manipulating Input to File System Calls An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_BUILD-7372.NASL description The build script uses cpio to extract untrusted rpm packages for bootstrapping virtual machines. cpio is not safe to use for this task, therefore the build script now uses bsdtar instead. (CVE-2010-4226) last seen 2020-06-01 modified 2020-06-02 plugin id 53234 published 2011-03-31 reporter This script is Copyright (C) 2011-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/53234 title SuSE 10 Security Update : build (ZYPP Patch Number 7372) 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(53234); script_version ("1.7"); script_cvs_date("Date: 2019/10/25 13:36:43"); script_cve_id("CVE-2010-4226"); script_name(english:"SuSE 10 Security Update : build (ZYPP Patch Number 7372)"); 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: "The build script uses cpio to extract untrusted rpm packages for bootstrapping virtual machines. cpio is not safe to use for this task, therefore the build script now uses bsdtar instead. (CVE-2010-4226)" ); script_set_attribute( attribute:"see_also", value:"http://support.novell.com/security/cve/CVE-2010-4226.html" ); script_set_attribute(attribute:"solution", value:"Apply ZYPP patch number 7372."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N"); 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:"2011/03/08"); script_set_attribute(attribute:"plugin_publication_date", value:"2011/03/31"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2011-2019 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:3, reference:"build-2007.05.10-0.16.1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else exit(0, "The host is not affected.");NASL family SuSE Local Security Checks NASL id SUSE_11_2_BUILD-110228.NASL description The build script uses cpio to extract untrusted rpm packages for bootstrapping virtual machines. cpio is not safe to use for this task, therefore the build script now uses bsdtar instead (CVE-2010-4226). last seen 2020-06-01 modified 2020-06-02 plugin id 53699 published 2011-05-05 reporter This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/53699 title openSUSE Security Update : build (openSUSE-SU-2011:0174-1) NASL family SuSE Local Security Checks NASL id SUSE_11_3_BUILD-110228.NASL description The build script uses cpio to extract untrusted rpm packages for bootstrapping virtual machines. cpio is not safe to use for this task, therefore the build script now uses bsdtar instead (CVE-2010-4226). last seen 2020-06-01 modified 2020-06-02 plugin id 75442 published 2014-06-13 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/75442 title openSUSE Security Update : build (openSUSE-SU-2011:0174-1) NASL family SuSE Local Security Checks NASL id SUSE_BUILD-7395.NASL description The build script uses cpio to extract untrusted rpm packages for bootstrapping virtual machines. cpio is not safe to use for this task, therefore the build script now uses bsdtar instead. (CVE-2010-4226) last seen 2020-06-01 modified 2020-06-02 plugin id 57163 published 2011-12-13 reporter This script is Copyright (C) 2011-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/57163 title SuSE 10 Security Update : build (ZYPP Patch Number 7395) NASL family SuSE Local Security Checks NASL id OPENSUSE-2017-1360.NASL description This OBS toolchain update fixes the following issues : Package last seen 2020-06-05 modified 2017-12-14 plugin id 105242 published 2017-12-14 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/105242 title openSUSE Security Update : the OBS toolchain (openSUSE-2017-1360)