Vulnerability CVE-2017-12869

Vulnerability Name:

CVE-2017-12869 (CCN-131381)

Assigned:

2017-05-05

Published:

2017-05-05

Updated:

2019-05-10

Summary:

The multiauth module in SimpleSAMLphp 1.14.13 and earlier allows remote attackers to bypass authentication context restrictions and use an authentication source defined in config/authsources.php via vectors related to improper validation of user input.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

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

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)

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

CVSS v2 Severity:

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

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

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)

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

Vulnerability Type:

CWE-20

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2017-12869

Source: XF
Type: UNKNOWN
simplesamlphp-cve201712869-sec-bypass(131381)

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20171212 [SECURITY] [DLA 1205-1] simplesamlphp security update

Source: CCN
Type: SimpleSAMLphp Security Advisories 201704-02
Authentication context bypass in the multiauth module

Source: CONFIRM
Type: Patch, Vendor Advisory
https://simplesamlphp.org/security/201704-02

Source: DEBIAN
Type: Third Party Advisory
DSA-4127

Vulnerable Configuration:

Configuration 1:

cpe:/a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:* (Version <= 1.14.13)

Configuration 2:

cpe:/o:debian:debian_linux:7.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:simplesamlphp:simplesamlphp:1.14.13:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:2017128690000000	V	CVE-2017-12869 on Ubuntu 16.04 LTS (xenial) - medium.	2017-09-01
oval:com.ubuntu.artful:def:201712869000	V	CVE-2017-12869 on Ubuntu 17.10 (artful) - medium.	2017-09-01
oval:com.ubuntu.xenial:def:201712869000	V	CVE-2017-12869 on Ubuntu 16.04 LTS (xenial) - medium.	2017-09-01
oval:com.ubuntu.disco:def:2017128690000000	V	CVE-2017-12869 on Ubuntu 19.04 (disco) - medium.	2017-09-01
oval:com.ubuntu.bionic:def:201712869000	V	CVE-2017-12869 on Ubuntu 18.04 LTS (bionic) - medium.	2017-09-01
oval:com.ubuntu.cosmic:def:2017128690000000	V	CVE-2017-12869 on Ubuntu 18.10 (cosmic) - medium.	2017-09-01
oval:com.ubuntu.cosmic:def:201712869000	V	CVE-2017-12869 on Ubuntu 18.10 (cosmic) - medium.	2017-09-01
oval:com.ubuntu.bionic:def:2017128690000000	V	CVE-2017-12869 on Ubuntu 18.04 LTS (bionic) - medium.	2017-09-01
oval:com.ubuntu.trusty:def:201712869000	V	CVE-2017-12869 on Ubuntu 14.04 LTS (trusty) - medium.	2017-09-01

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