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Sicherheit: Zwei Probleme in libzstd
Aktuelle Meldungen Distributionen
Name: Zwei Probleme in libzstd
ID: USN-4760-1
Distribution: Ubuntu
Plattformen: Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 20.10
Datum: Mo, 8. März 2021, 23:23
Referenzen: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-24031
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-24032
Applikationen: libzstd

Originalnachricht

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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: "ubuntu-security-announce@lists.ubuntu.com"
<ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <babecbfd-2c36-07d3-6b6a-9ffb47a0b261@canonical.com>
Subject: [USN-4760-1] libzstd vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-4760-1
March 08, 2021

libzstd vulnerabilities
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

libzstd could be made to expose sensitive information.

Software Description:
- libzstd: fast lossless compression algorithm

Details:

It was discovered that libzstd incorrectly handled file permissions. A
local attacker could possibly use this issue to access certain files,
contrary to expectations.

Update instructions:

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

Ubuntu 20.10:
libzstd1 1.4.5+dfsg-4ubuntu0.1
zstd 1.4.5+dfsg-4ubuntu0.1

Ubuntu 20.04 LTS:
libzstd1 1.4.4+dfsg-3ubuntu0.1
zstd 1.4.4+dfsg-3ubuntu0.1

Ubuntu 18.04 LTS:
libzstd1 1.3.3+dfsg-2ubuntu1.2
zstd 1.3.3+dfsg-2ubuntu1.2

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

References:
https://ubuntu.com/security/notices/USN-4760-1
CVE-2021-24031, CVE-2021-24032

Package Information:
https://launchpad.net/ubuntu/+source/libzstd/1.4.5+dfsg-4ubuntu0.1
https://launchpad.net/ubuntu/+source/libzstd/1.4.4+dfsg-3ubuntu0.1
https://launchpad.net/ubuntu/+source/libzstd/1.3.3+dfsg-2ubuntu1.2


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