Vulnerabilities > CVE-2018-17157 - Integer Overflow or Wraparound vulnerability in Freebsd
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error when handling opcodes can cause memory corruption by sending a specially crafted NFSv4 request. Unprivileged remote users with access to the NFS server may be able to execute arbitrary code.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Forced Integer Overflow This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Nessus
NASL family | FreeBSD Local Security Checks |
NASL id | FREEBSD_SA-18-13_NFS.NASL |
description | The version of the FreeBSD kernel running on the remote host is prior to 11.2-RELEASE-p5. It is, therefore, affected by multiple vulnerabilities in the Network File System (NFS) server code. |
last seen | 2020-06-01 |
modified | 2020-06-02 |
plugin id | 119307 |
published | 2018-11-30 |
reporter | This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. |
source | https://www.tenable.com/plugins/nessus/119307 |
title | FreeBSD < 11.2-RELEASE-p5 Multiple vulnerabilities in NFS server code (FreeBSD-SA-18:03.nfs) |
code |
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References
- http://www.securityfocus.com/bid/106192
- http://www.securityfocus.com/bid/106192
- http://www.securitytracker.com/id/1042164
- http://www.securitytracker.com/id/1042164
- https://secuniaresearch.flexerasoftware.com/secunia_research/2018-25/
- https://secuniaresearch.flexerasoftware.com/secunia_research/2018-25/
- https://security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc
- https://security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc