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Ubuntu 15.04 : linux vulnerabilities (USN-2684-1)

high Nessus Plugin ID 84985

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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

A flaw was discovered in the kvm (kernel virtual machine) subsystem's kvm_apic_has_events function. A unprivileged local user could exploit this flaw to cause a denial of service (system crash). (CVE-2015-4692)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter JIT optimization. A local attacker could exploit this flaw to cause a denial of service (system crash). (CVE-2015-4700)

A flaw was discovered in how the Linux kernel handles invalid UDP checksums. A remote attacker could exploit this flaw to cause a denial of service using a flood of UDP packets with invalid checksums.
(CVE-2015-5364)

A flaw was discovered in how the Linux kernel handles invalid UDP checksums. A remote attacker can cause a denial of service against applications that use epoll by injecting a single packet with an invalid checksum. (CVE-2015-5366).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected linux-image-3.19-generic, linux-image-3.19-generic-lpae and / or linux-image-3.19-lowlatency packages.

See Also

https://usn.ubuntu.com/2684-1/

Plugin Details

Severity: High

ID: 84985

File Name: ubuntu_USN-2684-1.nasl

Version: 2.12

Type: local

Agent: unix

Published: 7/24/2015

Updated: 1/19/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19-generic, cpe:/o:canonical:ubuntu_linux:15.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19-generic-lpae

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/23/2015

Vulnerability Publication Date: 7/27/2015

Reference Information

CVE: CVE-2015-4692, CVE-2015-4700, CVE-2015-5364, CVE-2015-5366

USN: 2684-1