Vulnerability Name:

CVE-2018-7644 (CCN-139839)

Assigned:2018-02-26
Published:2018-02-26
Updated:2019-10-03
Summary:The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.
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
7.5 High (CCN 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 (CCN 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
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
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-347
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2018-7644

Source: XF
Type: UNKNOWN
simplesamlphp-cve20187644-sec-bypass(139839)

Source: CCN
Type: SimpleSAMLphp 201802-01
Improper signature validation

Source: CONFIRM
Type: Vendor Advisory
https://simplesamlphp.org/security/201802-01

Vulnerable Configuration:Configuration 1:
  • cpe:/a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:* (Version < 1.15.3)

    • Configuration CCN 1:
  • cpe:/a:simplesamlphp:simplesamlphp:1.14.16:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.xenial:def:201876440000000
    V
    		CVE-2018-7644 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-03-05
    oval:com.ubuntu.artful:def:20187644000
    V
    		CVE-2018-7644 on Ubuntu 17.10 (artful) - untriaged.
    2018-03-05
    oval:com.ubuntu.xenial:def:20187644000
    V
    		CVE-2018-7644 on Ubuntu 16.04 LTS (xenial) - untriaged.
    2018-03-05
    oval:com.ubuntu.disco:def:201876440000000
    V
    		CVE-2018-7644 on Ubuntu 19.04 (disco) - medium.
    2018-03-05
    oval:com.ubuntu.bionic:def:20187644000
    V
    		CVE-2018-7644 on Ubuntu 18.04 LTS (bionic) - untriaged.
    2018-03-05
    oval:com.ubuntu.cosmic:def:201876440000000
    V
    		CVE-2018-7644 on Ubuntu 18.10 (cosmic) - untriaged.
    2018-03-05
    oval:com.ubuntu.cosmic:def:20187644000
    V
    		CVE-2018-7644 on Ubuntu 18.10 (cosmic) - untriaged.
    2018-03-05
    oval:com.ubuntu.bionic:def:201876440000000
    V
    		CVE-2018-7644 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-03-05
    oval:com.ubuntu.trusty:def:20187644000
    V
    		CVE-2018-7644 on Ubuntu 14.04 LTS (trusty) - untriaged.
    2018-03-05
    BACK
    simplesamlphp simplesamlphp *
    simplesamlphp simplesamlphp 1.14.16