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Vulnerability Details : CVE-2018-14633

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.
Publish Date : 2018-09-25 Last Update Date : 2020-08-28
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- CVSS Scores & Vulnerability Types

CVSS Score
8.3
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Overflow
CWE ID 787

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2018:3651: kernel security, bug fix, and enhancement update (Moderate) oval:com.redhat.rhsa:def:20183651 unix
RHSA-2018:3666: kernel-rt security and bug fix update (Moderate) oval:com.redhat.rhsa:def:20183666 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2018-14633

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 12.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 18.04 * * * Version Details Vulnerabilities
5 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
6 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
7 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
8 OS Redhat Enterprise Linux Eus 7.4 * * * Version Details Vulnerabilities
9 OS Redhat Enterprise Linux Eus 7.6 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux Server 7.0 * * * Version Details Vulnerabilities
11 OS Redhat Enterprise Linux Server Aus 7.4 * * * Version Details Vulnerabilities
12 OS Redhat Enterprise Linux Server Aus 7.6 * * * Version Details Vulnerabilities
13 OS Redhat Enterprise Linux Server Tus 7.4 * * * Version Details Vulnerabilities
14 OS Redhat Enterprise Linux Server Tus 7.6 * * * Version Details Vulnerabilities
15 OS Redhat Enterprise Linux Workstation 7.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 4
Debian Debian Linux 2
Linux Linux Kernel 1
Redhat Enterprise Linux Eus 2
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Server Aus 2
Redhat Enterprise Linux Server Tus 2
Redhat Enterprise Linux Workstation 1

- References For CVE-2018-14633

https://access.redhat.com/errata/RHSA-2018:3666
REDHAT RHSA-2018:3666
https://usn.ubuntu.com/3776-2/
UBUNTU USN-3776-2
https://usn.ubuntu.com/3776-1/
UBUNTU USN-3776-1
https://usn.ubuntu.com/3775-2/
UBUNTU USN-3775-2
https://usn.ubuntu.com/3779-1/
UBUNTU USN-3779-1
https://usn.ubuntu.com/3775-1/
UBUNTU USN-3775-1
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
MLIST [debian-lts-announce] 20181003 [SECURITY] [DLA 1531-1] linux-4.9 security update
https://seclists.org/oss-sec/2018/q3/270
https://usn.ubuntu.com/3777-3/
UBUNTU USN-3777-3
http://www.securityfocus.com/bid/105388
BID 105388 Linux Kernel 'chap_server_compute_md5()' Function Stack Buffer Overflow Vulnerability Release Date:2018-09-24
https://www.debian.org/security/2018/dsa-4308
DEBIAN DSA-4308
https://usn.ubuntu.com/3777-2/
UBUNTU USN-3777-2
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.19/scsi-fixes&id=1816494330a83f2a064499d8ed2797045641f92c CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14633 CONFIRM
https://usn.ubuntu.com/3777-1/
UBUNTU USN-3777-1
https://access.redhat.com/errata/RHSA-2018:3651
REDHAT RHSA-2018:3651
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?h=4.19/scsi-fixes&id=8c39e2699f8acb2e29782a834e56306da24937fe CONFIRM
https://access.redhat.com/errata/RHSA-2019:1946
REDHAT RHSA-2019:1946

- Metasploit Modules Related To CVE-2018-14633

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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