Vulnerability CVE-2017-12872

Vulnerability Name:

CVE-2017-12872 (CCN-131393)

Assigned:

2017-03-01

Published:

2017-03-01

Updated:

2019-05-13

Summary:

The (1) Htpasswd authentication source in the authcrypt module and (2) SimpleSAML_Session class in SimpleSAMLphp 1.14.11 and earlier allow remote attackers to conduct timing side-channel attacks by leveraging use of the standard comparison operator to compare secret material against user input.

CVSS v3 Severity:

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

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

CVSS v2 Severity:

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

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

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

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

Vulnerability Type:

CWE-200

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2017-12872

Source: XF
Type: UNKNOWN
simplesamlphp-cve201712872-weak-security(131393)

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

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20180629 [SECURITY] [DLA 1408-1] simplesamlphp security update

Source: CCN
Type: SimpleSAMLphp Web site
Multiple timing side-channel issues

Source: CONFIRM
Type: Patch, Vendor Advisory
https://simplesamlphp.org/security/201703-01

Vulnerable Configuration:

Configuration 1:

cpe:/a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:* (Version <= 1.14.11)

Configuration 2:

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

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

Configuration CCN 1:

cpe:/a:simplesamlphp:simplesamlphp:1.14.11:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:2017128720000000	V	CVE-2017-12872 on Ubuntu 16.04 LTS (xenial) - medium.	2017-09-01
oval:com.ubuntu.artful:def:201712872000	V	CVE-2017-12872 on Ubuntu 17.10 (artful) - medium.	2017-09-01
oval:com.ubuntu.xenial:def:201712872000	V	CVE-2017-12872 on Ubuntu 16.04 LTS (xenial) - medium.	2017-09-01
oval:com.ubuntu.disco:def:2017128720000000	V	CVE-2017-12872 on Ubuntu 19.04 (disco) - medium.	2017-09-01
oval:com.ubuntu.bionic:def:201712872000	V	CVE-2017-12872 on Ubuntu 18.04 LTS (bionic) - medium.	2017-09-01
oval:com.ubuntu.cosmic:def:2017128720000000	V	CVE-2017-12872 on Ubuntu 18.10 (cosmic) - medium.	2017-09-01
oval:com.ubuntu.cosmic:def:201712872000	V	CVE-2017-12872 on Ubuntu 18.10 (cosmic) - medium.	2017-09-01
oval:com.ubuntu.bionic:def:2017128720000000	V	CVE-2017-12872 on Ubuntu 18.04 LTS (bionic) - medium.	2017-09-01
oval:com.ubuntu.trusty:def:201712872000	V	CVE-2017-12872 on Ubuntu 14.04 LTS (trusty) - medium.	2017-09-01

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