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Ubuntu 14.04 LTS / 16.04 LTS : GNU C Library vulnerabilities (USN-3534-1)

critical Nessus Plugin ID 106134

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Synopsis

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

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3534-1 advisory.

 It was discovered that the GNU C library did not properly handle all of the possible return values from the kernel getcwd(2) syscall. A local attacker could potentially exploit this to execute arbitrary code in setuid programs and gain administrative privileges. (CVE-2018-1000001)

 A memory leak was discovered in the _dl_init_paths() function in the GNU C library dynamic loader. A local attacker could potentially exploit this with a specially crafted value in the LD_HWCAP_MASK environment variable, in combination with CVE-2017-1000409 and another vulnerability on a system with hardlink protections disabled, in order to gain administrative privileges. (CVE-2017-1000408)

 A heap-based buffer overflow was discovered in the _dl_init_paths() function in the GNU C library dynamic loader. A local attacker could potentially exploit this with a specially crafted value in the LD_LIBRARY_PATH environment variable, in combination with CVE-2017-1000408 and another vulnerability on a system with hardlink protections disabled, in order to gain administrative privileges. (CVE-2017-1000409)

 An off-by-one error leading to a heap-based buffer overflow was discovered in the GNU C library glob() implementation. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code via a maliciously crafted pattern. (CVE-2017-15670)

 A heap-based buffer overflow was discovered during unescaping of user names with the ~ operator in the GNU C library glob() implementation. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code via a maliciously crafted pattern. (CVE-2017-15804)

 It was discovered that the GNU C library dynamic loader mishandles RPATH and RUNPATH containing $ORIGIN for privileged (setuid or AT_SECURE) programs. A local attacker could potentially exploit this by providing a specially crafted library in the current working directory in order to gain administrative privileges. (CVE-2017-16997)

 It was discovered that the GNU C library malloc() implementation could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, resulting in a heap- based overflow. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 17.10. (CVE-2017-17426)

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 packages.

See Also

https://ubuntu.com/security/notices/USN-3534-1

Plugin Details

Severity: Critical

ID: 106134

File Name: ubuntu_USN-3534-1.nasl

Version: 3.12

Type: local

Agent: unix

Published: 1/18/2018

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.7

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

CVSS Score Source: CVE-2017-16997

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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:F/RL:O/RC:C

CVSS Score Source: CVE-2017-15804

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libc6-armel, p-cpe:/a:canonical:ubuntu_linux:libc6-s390, p-cpe:/a:canonical:ubuntu_linux:glibc-source, p-cpe:/a:canonical:ubuntu_linux:nscd, p-cpe:/a:canonical:ubuntu_linux:libc6-prof, p-cpe:/a:canonical:ubuntu_linux:libc6-dev-armel, p-cpe:/a:canonical:ubuntu_linux:multiarch-support, p-cpe:/a:canonical:ubuntu_linux:libc6-i386, p-cpe:/a:canonical:ubuntu_linux:locales, p-cpe:/a:canonical:ubuntu_linux:libc6-x32, p-cpe:/a:canonical:ubuntu_linux:libc-bin, p-cpe:/a:canonical:ubuntu_linux:locales-all, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libc6-amd64, p-cpe:/a:canonical:ubuntu_linux:libc6, p-cpe:/a:canonical:ubuntu_linux:libc6-dev-i386, p-cpe:/a:canonical:ubuntu_linux:libc6-udeb, p-cpe:/a:canonical:ubuntu_linux:libc6-pic, p-cpe:/a:canonical:ubuntu_linux:libc6-ppc64, p-cpe:/a:canonical:ubuntu_linux:libc6-dev, p-cpe:/a:canonical:ubuntu_linux:libc6-dev-ppc64, p-cpe:/a:canonical:ubuntu_linux:libnss-dns-udeb, p-cpe:/a:canonical:ubuntu_linux:libc-dev-bin, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libnss-files-udeb, p-cpe:/a:canonical:ubuntu_linux:libc6-dev-amd64, p-cpe:/a:canonical:ubuntu_linux:libc6-dev-x32, p-cpe:/a:canonical:ubuntu_linux:libc6-dev-s390, p-cpe:/a:canonical:ubuntu_linux:eglibc-source

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/17/2018

Vulnerability Publication Date: 10/20/2017

Exploitable With

Metasploit (glibc realpath() Privilege Escalation)

Reference Information

CVE: CVE-2017-1000408, CVE-2017-1000409, CVE-2017-15670, CVE-2017-15804, CVE-2017-16997, CVE-2017-17426, CVE-2018-1000001

USN: 3534-1