Vulnerability CVE-2018-20592

Vulnerability Name:

CVE-2018-20592 (CCN-154959)

Assigned:

2018-12-13

Published:

2018-12-13

Updated:

2019-04-03

Summary:

In Mini-XML (aka mxml) v2.12, there is a use-after-free in the mxmlAdd function of the mxml-node.c file. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted xml file, as demonstrated by mxmldoc.

CVSS v3 Severity:

5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
4.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

3.3 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
2.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

CWE-416

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-20592

Source: XF
Type: UNKNOWN
minixml-cve201820592-dos(154959)

Source: CCN
Type: Mini-XML GIT Repository
Multiple crashes when feeding mxmldoc bogus source files #237

Source: MISC
Type: Third Party Advisory
https://github.com/michaelrsweet/mxml/issues/237

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/uaf_mxml-node.c:128_1.txt.err

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/uaf_mxml-node.c:128_2.txt.err

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2019-d333d01e08

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2019-f99619e34d

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2018-20592

Vulnerable Configuration:

Configuration 1:

cpe:/a:msweet:mini-xml:2.12:*:*:*:*:*:*:*

Configuration 2:

cpe:/o:fedoraproject:fedora:28:*:*:*:*:*:*:*

OR cpe:/o:fedoraproject:fedora:29:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:mini-xml_project:mini-xml:2.12:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:2018205920000000	V	CVE-2018-20592 on Ubuntu 19.04 (disco) - medium.	2018-12-30
oval:com.ubuntu.bionic:def:201820592000	V	CVE-2018-20592 on Ubuntu 18.04 LTS (bionic) - medium.	2018-12-30
oval:com.ubuntu.cosmic:def:2018205920000000	V	CVE-2018-20592 on Ubuntu 18.10 (cosmic) - medium.	2018-12-30
oval:com.ubuntu.cosmic:def:201820592000	V	CVE-2018-20592 on Ubuntu 18.10 (cosmic) - medium.	2018-12-30
oval:com.ubuntu.bionic:def:2018205920000000	V	CVE-2018-20592 on Ubuntu 18.04 LTS (bionic) - medium.	2018-12-30
oval:com.ubuntu.trusty:def:201820592000	V	CVE-2018-20592 on Ubuntu 14.04 LTS (trusty) - medium.	2018-12-30
oval:com.ubuntu.xenial:def:2018205920000000	V	CVE-2018-20592 on Ubuntu 16.04 LTS (xenial) - medium.	2018-12-30
oval:com.ubuntu.xenial:def:201820592000	V	CVE-2018-20592 on Ubuntu 16.04 LTS (xenial) - medium.	2018-12-30

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