Vulnerability CVE-2018-11693

Vulnerability Name:

CVE-2018-11693 (CCN-144323)

Assigned:

2018-06-03

Published:

2018-06-03

Updated:

2019-03-11

Summary:

An issue was discovered in LibSass through 3.5.4. An out-of-bounds read of a memory region was found in the function Sass::Prelexer::skip_over_scopes which could be leveraged by an attacker to disclose information or manipulated to read from unmapped memory causing a denial of service.

CVSS v3 Severity:

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

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

4.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L)
3.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/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): Low Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

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

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

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

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

Vulnerability Type:

CWE-125

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2018-11693

Source: CCN
Type: IBM Security Bulletin 794165 (API Connect)
IBM API Connect is impacted by multiple open source software vulnerabilities.

Source: XF
Type: UNKNOWN
libsaas-cve201811693-info-disc(144323)

Source: CCN
Type: libsass GIT Repository
AddressSanitizer: heap-buffer-overflow (OOB read) in Sass::Prelexer::skip_over_scopes (libsass/src/prelexer.hpp:69:14) #2661

Source: MISC
Type: Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/sass/libsass/issues/2661

Vulnerable Configuration:

Configuration 1:

cpe:/a:sass-lang:libsass:*:*:*:*:*:*:*:* (Version <= 3.5.4)

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:2018116930000000	V	CVE-2018-11693 on Ubuntu 19.04 (disco) - medium.	2018-06-04
oval:com.ubuntu.artful:def:201811693000	V	CVE-2018-11693 on Ubuntu 17.10 (artful) - medium.	2018-06-04
oval:com.ubuntu.cosmic:def:2018116930000000	V	CVE-2018-11693 on Ubuntu 18.10 (cosmic) - medium.	2018-06-04
oval:com.ubuntu.bionic:def:201811693000	V	CVE-2018-11693 on Ubuntu 18.04 LTS (bionic) - medium.	2018-06-04
oval:com.ubuntu.bionic:def:2018116930000000	V	CVE-2018-11693 on Ubuntu 18.04 LTS (bionic) - medium.	2018-06-04
oval:com.ubuntu.cosmic:def:201811693000	V	CVE-2018-11693 on Ubuntu 18.10 (cosmic) - medium.	2018-06-04
oval:com.ubuntu.xenial:def:2018116930000000	V	CVE-2018-11693 on Ubuntu 16.04 LTS (xenial) - medium.	2018-06-04
oval:com.ubuntu.xenial:def:201811693000	V	CVE-2018-11693 on Ubuntu 16.04 LTS (xenial) - medium.	2018-06-04

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