drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Überschreiben von Dateien in Tar
Name: |
Überschreiben von Dateien in Tar |
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ID: |
201611-19 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Di, 22. November 2016, 13:26 |
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Referenzen: |
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6321 |
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Applikationen: |
GNU Tar |
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Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --8X9TKB6rBJdqQ4nuAqdwpULDGtmKWdk57 Content-Type: multipart/mixed; boundary="evBMxbW6XBIed9JpiXS9JHfgkl5M8g3sD" From: Aaron Bauman <bman@gentoo.org> To: gentoo-announce@lists.gentoo.org Message-ID: <c112dc18-df9a-9d81-08f4-42ea20fe4fa6@gentoo.org> Subject: [ GLSA 201611-19 ] Tar: Extract pathname bypass
--evBMxbW6XBIed9JpiXS9JHfgkl5M8g3sD Content-Type: multipart/alternative; boundary="------------E78144FB98398E68FD8932B6"
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201611-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: Tar: Extract pathname bypass Date: November 22, 2016 Bugs: #598334 ID: 201611-19
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Synopsis ========
A path traversal attack in Tar may lead to the remote execution of arbitrary code.
Background ==========
The Tar program provides the ability to create and manipulate tar archives.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-arch/tar < 1.29-r1 >= 1.29-r1
Description ===========
Tar attempts to avoid path traversal attacks by removing offending parts of the element name at extract. This sanitizing leads to a vulnerability where the attacker can bypass the path name(s) specified on the command line.
Impact ======
The attacker can create a crafted tar archive that, if extracted by the victim, replaces files and directories the victim has access to in the target directory, regardless of the path name(s) specified on the command line.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All Tar users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-arch/tar-1.29-r1"
References ==========
[ 1 ] CVE-2016-6321 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6321
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/201611-19
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 2016 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
--------------E78144FB98398E68FD8932B6 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 201611-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <a class=3D"moz-txt-link-freet= ext" href=3D"https://security.gentoo.org/">https://security.gentoo.org/</= a> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: Tar: Extract pathname bypass Date: November 22, 2016 Bugs: #598334 ID: 201611-19
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis =3D=3D=3D=3D=3D=3D=3D=3D
A path traversal attack in Tar may lead to the remote execution of arbitrary code.
Background =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The Tar program provides the ability to create and manipulate tar archives.
Affected packages =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-arch/tar < 1.29-r1 >=3D 1.2= 9-r1=20
Description =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Tar attempts to avoid path traversal attacks by removing offending parts of the element name at extract. This sanitizing leads to a vulnerability where the attacker can bypass the path name(s) specified on the command line.
Impact =3D=3D=3D=3D=3D=3D
The attacker can create a crafted tar archive that, if extracted by the victim, replaces files and directories the victim has access to in the target directory, regardless of the path name(s) specified on the command line.
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 Tar users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=3Dapp-arch/tar-1.29-r1"
References =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
[ 1 ] CVE-2016-6321 <a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.= cfm?cvename=3DCVE-2016-6321">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20= 16-6321</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/201611-19">https://security.gentoo.org/glsa/201611-19</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 2016 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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