drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mangelnde Rechteprüfung in vzctl
Name: |
Mangelnde Rechteprüfung in vzctl |
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ID: |
201701-30 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mi, 11. Januar 2017, 17:09 |
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Referenzen: |
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6927 |
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Applikationen: |
vzctl |
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Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --mmPCvbURK5jtMWgwoTn0uS6WNvCT9rtus Content-Type: multipart/mixed; boundary="OIWQNR8sUNwf46WhtujUrKa81Jk88hnra" From: Aaron Bauman <bman@gentoo.org> To: gentoo-announce@lists.gentoo.org Message-ID: <04f6040e-57da-0042-589e-8db525944d31@gentoo.org> Subject: [ GLSA 201701-30 ] vzctl: Security bypass
--OIWQNR8sUNwf46WhtujUrKa81Jk88hnra Content-Type: multipart/alternative; boundary="------------EF3FCEC2E63DA334C8EC657D"
This is a multi-part message in MIME format. --------------EF3FCEC2E63DA334C8EC657D Content-Type: text/plain; charset=utf- Content-Transfer-Encoding: quoted-printable
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201701-30 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: vzctl: Security bypass Date: January 11, 2017 Bugs: #560522 ID: 201701-30
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Synopsis ========
A vulnerability in vzctl might allow attackers to gain control over ploop containers.
Background ==========
vzctl is a set of control tools for the OpenVZ server virtualization solution.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-cluster/vzctl < 4.9.4 >= 4.9.4
Description ===========
It was discovered that vzctl determined the virtual environment (VE) layout based on the presence of root.hdd/DiskDescriptor.xml in the VE private directory. This allows local simfs container (CT) root users to change the root password for arbitrary ploop containers. This is demonstrated by a symlink attack on the ploop container root.hdd file which can then be used to access a control panel.
Impact ======
An attacker with root privileges, in a simfs-based container, could gain control over ploop-based containers.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All vzctl users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-cluster/vzctl-4.9.4"
References ==========
[ 1 ] CVE-2015-6927 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-6927
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/201701-30
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License =======
Copyright 2017 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
--------------EF3FCEC2E63DA334C8EC657D Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
<html> <head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf= -8"> </head> <body bgcolor=3D"#FFFFFF" text=3D"#000000"> <p> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Du= tf-8"> </p> <pre style=3D"color: rgb(0, 0, 0); font-style: normal; font-variant-l= igatures: normal; font-variant-caps: normal; font-weight: normal; letter-= spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-tr= ansform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0= px; word-wrap: break-word; white-space: pre-wrap;">- - - - - - - - - - - = - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201701-30 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <a class=3D"moz-txt-link-freet= ext" href=3D"https://security.gentoo.org/">https://security.gentoo.org/</= a> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: vzctl: Security bypass Date: January 11, 2017 Bugs: #560522 ID: 201701-30
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Synopsis =3D=3D=3D=3D=3D=3D=3D=3D
A vulnerability in vzctl might allow attackers to gain control over ploop containers.
Background =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
vzctl is a set of control tools for the OpenVZ server virtualization solution.
Affected packages =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-cluster/vzctl < 4.9.4 >=3D 4= =2E9.4=20
Description =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
It was discovered that vzctl determined the virtual environment (VE) layout based on the presence of root.hdd/DiskDescriptor.xml in the VE private directory. This allows local simfs container (CT) root users to change the root password for arbitrary ploop containers. This is demonstrated by a symlink attack on the ploop container root.hdd file which can then be used to access a control panel.
Impact =3D=3D=3D=3D=3D=3D
An attacker with root privileges, in a simfs-based container, could gain control over ploop-based containers.
Workaround =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
There is no known workaround at this time.
Resolution =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
All vzctl users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=3Dsys-cluster/vzctl-4.9.4"
References =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
[ 1 ] CVE-2015-6927 <a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.= cfm?cvename=3DCVE-2015-6927">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20= 15-6927</a>
Availability =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
<a class=3D"moz-txt-link-freetext" href=3D"https://security.gentoo.org/g= lsa/201701-30">https://security.gentoo.org/glsa/201701-30</a>
Concerns? =3D=3D=3D=3D=3D=3D=3D=3D=3D
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:security@gentoo.org"= >security@gentoo.org</a> or alternatively, you may file a bug at <a class=3D"moz-txt-link-freetext" href=3D"https://bugs.gentoo.org">https= ://bugs.gentoo.org</a>.
License =3D=3D=3D=3D=3D=3D=3D
Copyright 2017 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
<a class=3D"moz-txt-link-freetext" href=3D"http://creativecommons.org/lic= enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre> </body> </html>
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