drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Denial of Service in DHCP (Aktualisierung)
Name: |
Denial of Service in DHCP (Aktualisierung) |
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ID: |
USN-4969-3 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 21.04 |
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Datum: |
Mo, 7. Juni 2021, 23:37 |
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Referenzen: |
Keine Angabe |
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Applikationen: |
ISC DHCP |
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Update von: |
Denial of Service in DHCP |
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Originalnachricht |
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --FxSspeay34fWjTsQAdyiaxvH5RVt0PmrE Content-Type: multipart/mixed; boundary="F99gvWBibv5aJ1pOPDivsCJASUd3P0lcM"; 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: <bb889783-16f8-1cf3-c2cf-09228d1ae8a4@canonical.com> Subject: [USN-4969-3] DHCP regression
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========================================================================== Ubuntu Security Notice USN-4969-3 June 07, 2021
isc-dhcp regression ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
Summary:
USN-4969-1 introduced a regression in DHCP.
Software Description: - isc-dhcp: DHCP server and client
Details:
USN-4969-1 fixed a vulnerability in DHCP. The package for Ubuntu 21.04 introduced a regression causing it to reject certain valid configuration files. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to cause DHCP to crash, resulting in a denial of service.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.04: isc-dhcp-client 4.4.1-2.2ubuntu6.2 isc-dhcp-server 4.4.1-2.2ubuntu6.2
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-4969-3 https://ubuntu.com/security/notices/USN-4969-1 https://launchpad.net/bugs/1930917
Package Information: https://launchpad.net/ubuntu/+source/isc-dhcp/4.4.1-2.2ubuntu6.2
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