National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

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.

Source:  MITRE
Description Last Modified:  09/24/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.0 HIGH
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H (V3 legend)
Impact Score: 4.7
Exploitability Score: 2.2


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 8.3 HIGH
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:C) (V2 legend)
Impact Subscore: 8.5
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Complete
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

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
https://access.redhat.com/errata/RHSA-2018:3666
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

Technical Details

Vulnerability Type (View All)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
3.10
Up to (including)
3.10.102
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.14
Up to (including)
4.14.81
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.18
Up to (including)
4.18.19

Configuration 2 ( hide )
 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-14633
NVD Published Date:
09/24/2018
NVD Last Modified:
11/27/2018