drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Dnsmasq (Aktualisierung)
Name: |
Mehrere Probleme in Dnsmasq (Aktualisierung) |
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ID: |
USN-4698-2 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 20.10 |
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Datum: |
Mi, 24. Februar 2021, 22:57 |
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Referenzen: |
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25687
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25684
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25681
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25682
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25686
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25683
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14834
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25685 |
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Applikationen: |
Dnsmasq |
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Update von: |
Mehrere Probleme in Dnsmasq |
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Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6435277964881555755== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="HGSjdVL6YVce2E93PCUkGEZ8h4vJB3DA6"
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --HGSjdVL6YVce2E93PCUkGEZ8h4vJB3DA6 Content-Type: multipart/mixed; boundary="m6WWOxwNZrXWIFV8N8EE3CErhfwhO7Mj7"; protected-headers="v1" 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: <dcfcee11-95da-5831-aaa9-a97e26d17ffc@canonical.com> Subject: [USN-4698-2] Dnsmasq regression
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========================================================================== Ubuntu Security Notice USN-4698-2 February 24, 2021
dnsmasq regression ==========================================================================
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
Summary:
USN-4698-1 introduced regressions in Dnsmasq.
Software Description: - dnsmasq: Small caching DNS proxy and DHCP/TFTP server
Details:
USN-4698-1 fixed vulnerabilities in Dnsmasq. The updates introduced regressions in certain environments related to issues with multiple queries, and issues with retries. This update fixes the problem.
Original advisory details:
Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled memory when sorting RRsets. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-25681, CVE-2020-25687) Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled extracting certain names. A remote attacker could use this issue to cause Dnsmasq to hang, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-25682, CVE-2020-25683) Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly implemented address/port checks. A remote attacker could use this issue to perform a cache poisoning attack. (CVE-2020-25684) Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly implemented query resource name checks. A remote attacker could use this issue to perform a cache poisoning attack. (CVE-2020-25685) Moshe Kol and Shlomi Oberman discovered that Dnsmasq incorrectly handled multiple query requests for the same resource name. A remote attacker could use this issue to perform a cache poisoning attack. (CVE-2020-25686) It was discovered that Dnsmasq incorrectly handled memory during DHCP response creation. A remote attacker could possibly use this issue to cause Dnsmasq to consume resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2019-14834)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10: dnsmasq 2.82-1ubuntu1.2 dnsmasq-base 2.82-1ubuntu1.2 dnsmasq-utils 2.82-1ubuntu1.2
Ubuntu 20.04 LTS: dnsmasq 2.80-1.1ubuntu1.3 dnsmasq-base 2.80-1.1ubuntu1.3 dnsmasq-utils 2.80-1.1ubuntu1.3
Ubuntu 18.04 LTS: dnsmasq 2.79-1ubuntu0.3 dnsmasq-base 2.79-1ubuntu0.3 dnsmasq-utils 2.79-1ubuntu0.3
Ubuntu 16.04 LTS: dnsmasq 2.75-1ubuntu0.16.04.8 dnsmasq-base 2.75-1ubuntu0.16.04.8 dnsmasq-utils 2.75-1ubuntu0.16.04.8
After a standard system update you need to reboot your computer to make all the necessary changes.
References: https://usn.ubuntu.com/4698-2 https://usn.ubuntu.com/4698-1 https://launchpad.net/bugs/1916462
Package Information: https://launchpad.net/ubuntu/+source/dnsmasq/2.82-1ubuntu1.2 https://launchpad.net/ubuntu/+source/dnsmasq/2.80-1.1ubuntu1.3 https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1ubuntu0.3 https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.16.04.8
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