drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in ISC DHCP
Name: |
Mehrere Probleme in ISC DHCP |
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ID: |
USN-3586-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 17.10 |
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Datum: |
Do, 1. März 2018, 22:15 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3144
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2774
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5732
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5733 |
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Applikationen: |
ISC DHCP |
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Originalnachricht |
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --9slLbgocpLFL1c9hy5BS46TuYOXM8AMEt Content-Type: multipart/mixed; boundary="M5WPZIEktBNWiksWMW1KKHCJ8AK2eaxxG"; 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: <f14b238d-0583-b41e-1f13-8c10d1254e3f@canonical.com> Subject: [USN-3586-1] DHCP vulnerabilities
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========================================================================== Ubuntu Security Notice USN-3586-1 March 01, 2018
isc-dhcp vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in DHCP.
Software Description: - isc-dhcp: DHCP server and client
Details:
Konstantin Orekhov discovered that the DHCP server incorrectly handled a large number of concurrent TCP sessions. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2774)
It was discovered that the DHCP server incorrectly handled socket descriptors. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2017-3144)
Felix Wilhelm discovered that the DHCP client incorrectly handled certain malformed responses. A remote attacker could use this issue to cause the DHCP client to crash, resulting in a denial of service, or possibly execute arbitrary code. In the default installation, attackers would be isolated by the dhclient AppArmor profile. (CVE-2018-5732)
Felix Wilhelm discovered that the DHCP server incorrectly handled reference counting. A remote attacker could possibly use this issue to cause the DHCP server to crash, resulting in a denial of service. (CVE-2018-5733)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 17.10: isc-dhcp-client 4.3.5-3ubuntu2.2 isc-dhcp-relay 4.3.5-3ubuntu2.2 isc-dhcp-server 4.3.5-3ubuntu2.2 isc-dhcp-server-ldap 4.3.5-3ubuntu2.2
Ubuntu 16.04 LTS: isc-dhcp-client 4.3.3-5ubuntu12.9 isc-dhcp-relay 4.3.3-5ubuntu12.9 isc-dhcp-server 4.3.3-5ubuntu12.9 isc-dhcp-server-ldap 4.3.3-5ubuntu12.9
Ubuntu 14.04 LTS: isc-dhcp-client 4.2.4-7ubuntu12.12 isc-dhcp-relay 4.2.4-7ubuntu12.12 isc-dhcp-server 4.2.4-7ubuntu12.12 isc-dhcp-server-ldap 4.2.4-7ubuntu12.12
In general, a standard system update will make all the necessary changes.
References: https://usn.ubuntu.com/usn/usn-3586-1 CVE-2016-2774, CVE-2017-3144, CVE-2018-5732, CVE-2018-5733
Package Information: https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.5-3ubuntu2.2 https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.3-5ubuntu12.9 https://launchpad.net/ubuntu/+source/isc-dhcp/4.2.4-7ubuntu12.12
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