Vulnerability Name:

CVE-2018-6519 (CCN-138626)

Assigned:2018-02-01
Published:2018-02-01
Updated:2018-10-03
Summary:The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
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:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/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): None
Availibility (A): High
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
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:N/A:L/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): None
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-74
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-6519

Source: XF
Type: UNKNOWN
simplesamlphp-cve20186519-dos(138626)

Source: CCN
Type: SimpleSAMLphp 201801-01
Denial of Service in timestamp validation function

Source: CONFIRM
Type: Vendor Advisory
https://simplesamlphp.org/security/201801-01

Source: DEBIAN
Type: Third Party Advisory
DSA-4127

Vulnerable Configuration:Configuration 1:
  • cpe:/a:simplesamlphp:saml2:*:*:*:*:*:*:*:* (Version >= 1.0.0 and < 1.10.4)
  • OR cpe:/a:simplesamlphp:saml2:*:*:*:*:*:*:*:* (Version >= 2.0.0 and < 2.3.5)
  • OR cpe:/a:simplesamlphp:saml2:*:*:*:*:*:*:*:* (Version >= 3.0.0 and < 3.1.1)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.xenial:def:201865190000000
    V
    		CVE-2018-6519 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-02-02
    oval:com.ubuntu.disco:def:201865190000000
    V
    		CVE-2018-6519 on Ubuntu 19.04 (disco) - medium.
    2018-02-02
    oval:com.ubuntu.bionic:def:201865190000000
    V
    		CVE-2018-6519 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-02-02
    oval:com.ubuntu.artful:def:20186519000
    V
    		CVE-2018-6519 on Ubuntu 17.10 (artful) - untriaged.
    2018-02-01
    oval:com.ubuntu.xenial:def:20186519000
    V
    		CVE-2018-6519 on Ubuntu 16.04 LTS (xenial) - untriaged.
    2018-02-01
    oval:com.ubuntu.bionic:def:20186519000
    V
    		CVE-2018-6519 on Ubuntu 18.04 LTS (bionic) - untriaged.
    2018-02-01
    oval:com.ubuntu.cosmic:def:201865190000000
    V
    		CVE-2018-6519 on Ubuntu 18.10 (cosmic) - untriaged.
    2018-02-01
    oval:com.ubuntu.cosmic:def:20186519000
    V
    		CVE-2018-6519 on Ubuntu 18.10 (cosmic) - untriaged.
    2018-02-01
    oval:com.ubuntu.trusty:def:20186519000
    V
    		CVE-2018-6519 on Ubuntu 14.04 LTS (trusty) - untriaged.
    2018-02-01
    BACK
    simplesamlphp saml2 *
    simplesamlphp saml2 *
    simplesamlphp saml2 *
    debian debian linux 8.0
    debian debian linux 9.0