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Sicherheit: Überschreiben von Dateien in OpenSSH
Aktuelle Meldungen Distributionen
Name: Überschreiben von Dateien in OpenSSH
ID: 201801-05
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Mo, 8. Januar 2018, 07:09
Referenzen: https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-15906

Originalnachricht

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Gentoo Linux Security Advisory GLSA 201801-05
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https://security.gentoo.org/
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Severity: Normal
Title: OpenSSH: Permission issue
Date: January 07, 2018
Bugs: #633428
ID: 201801-05

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Synopsis
========

A flaw has been discovered in OpenSSH which could allow a remote
attacker to create zero-length files.

Background
==========

OpenSSH is a complete SSH protocol implementation that includes SFTP
client and server support.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/openssh < 7.5_p1-r3 >= 7.5_p1-r3

Description
===========

The process_open function in sftp-server.c in OpenSSH did not properly
prevent write operations in readonly mode.

Impact
======

A remote attacker could cause the creation of zero-length files.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSH users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openssh-7.5_p1-r3"

References
==========

[ 1 ] CVE-2017-15906
https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-15906

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/201801-05

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
=======

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