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Ubuntu 16.04 LTS / 18.04 LTS : libseccomp vulnerability (USN-4001-1)

critical Nessus Plugin ID 125624

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Synopsis

The remote Ubuntu host is missing a security update.

Description

Jann Horn discovered that libseccomp did not correctly generate 64-bit syscall argument comparisons with arithmetic operators (LT, GT, LE, GE). An attacker could use this to bypass intended access restrictions for argument-filtered system calls.

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 libseccomp-dev, libseccomp2 and / or seccomp packages.

See Also

https://ubuntu.com/security/notices/USN-4001-1

Plugin Details

Severity: Critical

ID: 125624

File Name: ubuntu_USN-4001-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 5/31/2019

Updated: 10/20/2023

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: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2019-9893

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libseccomp2, p-cpe:/a:canonical:ubuntu_linux:seccomp, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libseccomp-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/30/2019

Vulnerability Publication Date: 3/21/2019

Reference Information

CVE: CVE-2019-9893

USN: 4001-1