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Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2681-1)

critical Nessus Plugin ID 84982

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2681-1 advisory.

 A flaw was discovered in the user space memory copying for the pipe iovecs in the Linux kernel. An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or potentially escalate their privileges. (CVE-2015-1805)

 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)

 A double free flaw was discovered in the Linux kernel's path lookup. A local user could cause a denial of service (Oops). (CVE-2015-5706)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-2681-1

Plugin Details

Severity: Critical

ID: 84982

File Name: ubuntu_USN-2681-1.nasl

Version: 2.18

Type: local

Agent: unix

Published: 7/24/2015

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2015-1805

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

CVSS Score Source: CVE-2015-5364

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-58-lowlatency

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/23/2015

Vulnerability Publication Date: 7/27/2015

Reference Information

CVE: CVE-2015-1805, CVE-2015-4692, CVE-2015-4700, CVE-2015-5364, CVE-2015-5366, CVE-2015-5706

BID: 74951

USN: 2681-1