CVE-2018-14633 Detail

Current Description

A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.0 HIGH
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score:  7.0 HIGH
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/105388 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2018:3651 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:3666 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:1946 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14633 Issue Tracking  Patch  Third Party Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.19/scsi-fixes&id=1816494330a83f2a064499d8ed2797045641f92c Patch  Vendor Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.19/scsi-fixes&id=8c39e2699f8acb2e29782a834e56306da24937fe Patch  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html Mailing List  Third Party Advisory 
https://seclists.org/oss-sec/2018/q3/270 Mailing List  Third Party Advisory 
https://usn.ubuntu.com/3775-1/ Third Party Advisory 
https://usn.ubuntu.com/3775-2/ Third Party Advisory 
https://usn.ubuntu.com/3776-1/ Third Party Advisory 
https://usn.ubuntu.com/3776-2/ Third Party Advisory 
https://usn.ubuntu.com/3777-1/ Third Party Advisory 
https://usn.ubuntu.com/3777-2/ Third Party Advisory 
https://usn.ubuntu.com/3777-3/ Third Party Advisory 
https://usn.ubuntu.com/3779-1/ Third Party Advisory 
https://www.debian.org/security/2018/dsa-4308 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST  
CWE-121 Stack-based Buffer Overflow Reference acceptance level Red Hat, Inc.  

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Change History

12 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-14633
NVD Published Date:
09/24/2018
NVD Last Modified:
08/28/2020
Source:
Red Hat, Inc.