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Sicherheit: Zwei Probleme in tar
Aktuelle Meldungen Distributionen
Name: Zwei Probleme in tar
ID: USN-4692-1
Distribution: Ubuntu
Plattformen: Ubuntu 16.04 LTS, Ubuntu 12.04 ESM, Ubuntu 18.04 LTS, Ubuntu 14.04 ESM, Ubuntu 20.04 LTS, Ubuntu 20.10
Datum: Do, 14. Januar 2021, 08:13
Referenzen: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20482
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9923
Applikationen: GNU Tar

Originalnachricht

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==========================================================================
Ubuntu Security Notice USN-4692-1
January 13, 2021

tar vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in tar.

Software Description:
- tar: GNU version of the tar archiving utility

Details:

Chris Siebenmann discovered that tar incorrectly handled extracting files
resized during extraction when invoked with the --sparse flag. An attacker
could possibly use this issue to cause a denial of service. This issue
only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2018-20482)

Daniel Axtens discovered that tar incorrectly handled certain malformed
tar files. If a user or automated system were tricked into processing a
specially crafted tar archive, a remote attacker could use this issue to
cause tar to crash, resulting in a denial of service. (CVE-2019-9923)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
tar 1.30+dfsg-7ubuntu0.20.10.1

Ubuntu 20.04 LTS:
tar 1.30+dfsg-7ubuntu0.20.04.1

Ubuntu 18.04 LTS:
tar 1.29b-2ubuntu0.2

Ubuntu 16.04 LTS:
tar 1.28-2.1ubuntu0.2

Ubuntu 14.04 ESM:
tar 1.27.1-1ubuntu0.1+esm1

Ubuntu 12.04 ESM:
tar 1.26-4ubuntu1.2

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4692-1
CVE-2018-20482, CVE-2019-9923

Package Information:
https://launchpad.net/ubuntu/+source/tar/1.30+dfsg-7ubuntu0.20.10.1
https://launchpad.net/ubuntu/+source/tar/1.30+dfsg-7ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/tar/1.29b-2ubuntu0.2
https://launchpad.net/ubuntu/+source/tar/1.28-2.1ubuntu0.2


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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Ubuntu Security Notice USN-4692-1
January 13, 2021

tar vulnerabilities
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in tar.

Software Description:
- tar: GNU version of the tar archiving utility

Details:

Chris Siebenmann discovered that tar incorrectly handled extracting files=

resized during extraction when invoked with the --sparse flag. An attacke=
r
could possibly use this issue to cause a denial of service. This issue
only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2018-20482)

Daniel Axtens discovered that tar incorrectly handled certain malformed
tar files. If a user or automated system were tricked into processing a
specially crafted tar archive, a remote attacker could use this issue to
cause tar to crash, resulting in a denial of service. (CVE-2019-9923)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
tar 1.30+dfsg-7ubuntu0.20.10.1

Ubuntu 20.04 LTS:
tar 1.30+dfsg-7ubuntu0.20.04.1

Ubuntu 18.04 LTS:
tar 1.29b-2ubuntu0.2

Ubuntu 16.04 LTS:
tar 1.28-2.1ubuntu0.2

Ubuntu 14.04 ESM:
tar 1.27.1-1ubuntu0.1+esm1

Ubuntu 12.04 ESM:
tar 1.26-4ubuntu1.2

In general, a standard system update will make all the necessary changes.=


References:
<a class=3D"moz-txt-link-freetext" href=3D"https://usn.ubuntu.com/4692-=
1">https://usn.ubuntu.com/4692-1</a>
CVE-2018-20482, CVE-2019-9923

Package Information:
<a class=3D"moz-txt-link-freetext" href=3D"https://launchpad.net/ubuntu=
/+source/tar/1.30+dfsg-7ubuntu0.20.10.1">https://launchpad.net/ubuntu/+so=
urce/tar/1.30+dfsg-7ubuntu0.20.10.1</a>
<a class=3D"moz-txt-link-freetext" href=3D"https://launchpad.net/ubuntu=
/+source/tar/1.30+dfsg-7ubuntu0.20.04.1">https://launchpad.net/ubuntu/+so=
urce/tar/1.30+dfsg-7ubuntu0.20.04.1</a>
<a class=3D"moz-txt-link-freetext" href=3D"https://launchpad.net/ubuntu=
/+source/tar/1.29b-2ubuntu0.2">https://launchpad.net/ubuntu/+source/tar/1=
=2E29b-2ubuntu0.2</a>
<a class=3D"moz-txt-link-freetext" href=3D"https://launchpad.net/ubuntu=
/+source/tar/1.28-2.1ubuntu0.2">https://launchpad.net/ubuntu/+source/tar/=
1.28-2.1ubuntu0.2</a>
</pre>
</div>
</body>
</html>

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