Vulnerabilities > CVE-2015-1331 - Link Following vulnerability in Linuxcontainers LXC

047910
CVSS 4.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
COMPLETE
Availability impact
NONE
local
low complexity
linuxcontainers
CWE-59
nessus

Summary

lxclock.c in LXC 1.1.2 and earlier allows local users to create arbitrary files via a symlink attack on /run/lock/lxc/*.

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 familySuSE Local Security Checks
    NASL idOPENSUSE-2015-523.NASL
    descriptionlxc was updated to fix two security issues. The following vulnerabilities were fixed : - CVE-2015-1331: directory traversal flaw allowing arbitrary file creation as the root user (bnc#938522) - CVE-2015-1334: AppArmor or SELinux confinement escape via fake /proc (bnc#938523)
    last seen2020-06-05
    modified2015-07-31
    plugin id85135
    published2015-07-31
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/85135
    titleopenSUSE Security Update : lxc (openSUSE-2015-523)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-2675-1.NASL
    descriptionRoman Fiedler discovered that LXC had a directory traversal flaw when creating lock files. A local attacker could exploit this flaw to create an arbitrary file as the root user. (CVE-2015-1331) Roman Fiedler discovered that LXC incorrectly trusted the container
    last seen2020-06-01
    modified2020-06-02
    plugin id84957
    published2015-07-23
    reporterUbuntu Security Notice (C) 2015-2019 Canonical, Inc. / NASL script (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84957
    titleUbuntu 14.04 LTS / 14.10 / 15.04 : lxc vulnerabilities (USN-2675-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2015-12608.NASL
    descriptionSecurity fix for CVE-2015-1331, CVE-2015-1334. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2015-08-11
    plugin id85313
    published2015-08-11
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/85313
    titleFedora 23 : lxc-1.1.2-2.fc23 (2015-12608)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2015-12645.NASL
    descriptionSecurity fix for CVE-2015-1331, CVE-2015-1334. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2015-08-11
    plugin id85314
    published2015-08-11
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/85314
    titleFedora 21 : lxc-1.0.7-2.fc21 (2015-12645)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2015-12647.NASL
    descriptionSecurity fix for CVE-2015-1331, CVE-2015-1334. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2015-08-11
    plugin id85315
    published2015-08-11
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/85315
    titleFedora 22 : lxc-1.1.2-2.fc22 (2015-12647)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3317.NASL
    descriptionSeveral vulnerabilities have been discovered in LXC, the Linux Containers userspace tools. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2015-1331 Roman Fiedler discovered a directory traversal flaw in LXC when creating lock files. A local attacker could exploit this flaw to create an arbitrary file as the root user. - CVE-2015-1334 Roman Fiedler discovered that LXC incorrectly trusted the container
    last seen2020-06-01
    modified2020-06-02
    plugin id84993
    published2015-07-27
    reporterThis script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84993
    titleDebian DSA-3317-1 : lxc - security update
  • NASL familyOracle Linux Local Security Checks
    NASL idORACLELINUX_ELSA-2015-3065.NASL
    descriptionDescription of changes: [1.0.7-2.0.7] - [Orabug 21533491] CVE-2015-1334: Don
    last seen2020-06-01
    modified2020-06-02
    plugin id85178
    published2015-08-03
    reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/85178
    titleOracle Linux 6 / 7 : lxc (ELSA-2015-3065)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-1481.NASL
    descriptionThis update for lxc, lxcfs to version 3.1.0 fixes the following issues : Security issues fixed : - CVE-2019-5736: Fixed a container breakout vulnerability (boo#1122185). - CVE-2018-6556: Enable setuid bit on lxc-user-nic (boo#988348). Non-security issues fixed : - Update to LXC 3.1.0. The changelog is far too long to include here, please look at https://linuxcontainers.org/. (boo#1131762)
    last seen2020-06-01
    modified2020-06-02
    plugin id125668
    published2019-06-03
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/125668
    titleopenSUSE Security Update : lxc / lxcfs (openSUSE-2019-1481)