Vulnerabilities > CVE-2015-5247 - Improper Access Control vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
The virStorageVolCreateXML API in libvirt 1.2.14 through 1.2.19 allows remote authenticated users with a read-write connection to cause a denial of service (libvirtd crash) by triggering a failed unlink after creating a volume on a root_squash NFS pool.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 6 | |
| OS | 4 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Embedding Scripts within Scripts An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
- Signature Spoofing by Key Theft An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Nessus
| NASL family | Ubuntu Local Security Checks |
| NASL id | UBUNTU_USN-2867-1.NASL |
| description | It was discovered that libvirt incorrectly handled the firewall rules on bridge networks when the daemon was restarted. This could result in an unintended firewall configuration. This issue only applied to Ubuntu 12.04 LTS. (CVE-2011-4600) Peter Krempa discovered that libvirt incorrectly handled locking when certain ACL checks failed. A local attacker could use this issue to cause libvirt to stop responding, resulting in a denial of service. This issue only applied to Ubuntu 14.04 LTS. (CVE-2014-8136) Luyao Huang discovered that libvirt incorrectly handled VNC passwords in shapshot and image files. A remote authenticated user could use this issue to possibly obtain VNC passwords. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-0236) Han Han discovered that libvirt incorrectly handled volume creation failure when used with NFS. A remote authenticated user could use this issue to cause libvirt to crash, resulting in a denial of service. This issue only applied to Ubuntu 15.10. (CVE-2015-5247) Ossi Herrala and Joonas Kuorilehto discovered that libvirt incorrectly performed storage pool name validation. A remote authenticated user could use this issue to bypass ACLs and gain access to unintended files. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.04 and Ubuntu 15.10. (CVE-2015-5313). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 87888 |
| published | 2016-01-13 |
| reporter | Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/87888 |
| title | Ubuntu 12.04 LTS / 14.04 LTS / 15.04 / 15.10 : libvirt vulnerabilities (USN-2867-1) |
| code | |