Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3146-1)

high Nessus Plugin ID 95432

Synopsis

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

Description

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3146-1 advisory.

- The filesystem implementation in the Linux kernel through 4.8.2 preserves the setgid bit during a setxattr call, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. (CVE-2016-7097)

- The arcmsr_iop_message_xfer function in drivers/scsi/arcmsr/arcmsr_hba.c in the Linux kernel through 4.8.2 does not restrict a certain length field, which allows local users to gain privileges or cause a denial of service (heap-based buffer overflow) via an ARCMSR_MESSAGE_WRITE_WQBUFFER control code. (CVE-2016-7425)

- Stack-based buffer overflow in the brcmf_cfg80211_start_ap function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux kernel before 4.7.5 allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a long SSID Information Element in a command to a Netlink socket. (CVE-2016-8658)

- The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels. (CVE-2016-9644)

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-3146-1

Plugin Details

Severity: High

ID: 95432

File Name: ubuntu_USN-3146-1.nasl

Version: 3.10

Type: local

Agent: unix

Published: 12/1/2016

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

CVSS Score Source: CVE-2016-9644

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-51-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:16.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/30/2016

Vulnerability Publication Date: 10/16/2016

Reference Information

CVE: CVE-2016-7097, CVE-2016-7425, CVE-2016-8658, CVE-2016-9644

USN: 3146-1