Vulnerability Name:

CVE-2020-15598

Assigned:2020-10-06
Published:2020-10-06
Updated:2020-10-14
Summary:** DISPUTED ** Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request.
Note: The discoverer reports "Trustwave has signaled they are disputing our claims." The CVE suggests that there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of Service condition. The vendor does not consider this as a security issue because1) there is no default configuration issue here. An attacker would need to know that a rule using a potentially problematic regular expression was in place, 2) the attacker would need to know the basic nature of the regular expression itself to exploit any resource issues. It's well known that regular expression usage can be taxing on system resources regardless of the use case. It is up to the administrator to decide on when it is appropriate to trade resources for potential security benefit.
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)
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
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
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
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-835
References:Source: MITRE
Type: CNA
CVE-2020-15598

Source: MISC
Type: Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/159185/ModSecurity-3.0.x-Denial-Of-Service.html

Source: MISC
Type: Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Sep/32

Source: MISC
Type: Exploit, Patch, Third Party Advisory
https://coreruleset.org/20200914/cve-2020-15598/

Source: CONFIRM
Type: Third Party Advisory
https://www.debian.org/security/2020/dsa-4765

Source: MISC
Type: Product, Vendor Advisory
https://www.modsecurity.org

Vulnerable Configuration:Configuration 1:
  • cpe:/a:trustwave:modsecurity:*:*:*:*:*:*:*:* (Version >= 3.0.0 and <= 3.0.4)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Vulnerability Name:

    CVE-2020-15598 (CCN-188276)

    Assigned:2020-09-14
    Published:2020-09-14
    Updated:2020-10-14
    Summary:** DISPUTED ** Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request.
    Note: The discoverer reports "Trustwave has signaled they are disputing our claims." The CVE suggests that there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of Service condition. The vendor does not consider this as a security issue because1) there is no default configuration issue here. An attacker would need to know that a rule using a potentially problematic regular expression was in place, 2) the attacker would need to know the basic nature of the regular expression itself to exploit any resource issues. It's well known that regular expression usage can be taxing on system resources regardless of the use case. It is up to the administrator to decide on when it is appropriate to trade resources for potential security benefit.
    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)
    6.6 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:U/RC:R)
    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
    7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
    6.6 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:H/E:U/RL:U/RC:R)
    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
    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
    7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
    Exploitability Metrics:Access Vector (AV): Network
    Access Complexity (AC): Low
    Athentication (Au): None
    Impact Metrics:Confidentiality (C): None
    Integrity (I): None
    Availibility (A): Complete
    Vulnerability Type:CWE-835
    Vulnerability Consequences:Denial of Service
    References:Source: MITRE
    Type: CNA
    CVE-2020-15598

    Source: MISC
    Type: Third Party Advisory, VDB Entry
    http://packetstormsecurity.com/files/159185/ModSecurity-3.0.x-Denial-Of-Service.html

    Source: MISC
    Type: Mailing List, Third Party Advisory
    http://seclists.org/fulldisclosure/2020/Sep/32

    Source: MISC
    Type: Exploit, Patch, Third Party Advisory
    https://coreruleset.org/20200914/cve-2020-15598/

    Source: XF
    Type: UNKNOWN
    modsecurity-cve202015598-dos(188276)

    Source: CCN
    Type: Full-Disclosure Mailing List, Mon, 14 Sep 2020 09:53:44 +0200
    ModSecurity v3 affected by DoS (CVE-2020-15598)

    Source: CONFIRM
    Type: Third Party Advisory
    https://www.debian.org/security/2020/dsa-4765

    Source: MISC
    Type: Product, Vendor Advisory
    https://www.modsecurity.org

    Source: CCN
    Type: ModSecurity Web site
    ModSecurity

    Vulnerable Configuration:Configuration CCN 1:
  • cpe:/a:trustwave:modsecurity:3.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:trustwave:modsecurity:3.0.1:*:*:*:*:*:*:*
  • OR cpe:/a:trustwave:modsecurity:3.0.2:*:*:*:*:*:*:*
  • OR cpe:/a:trustwave:modsecurity:3.0.3:*:*:*:*:*:*:*
  • OR cpe:/a:trustwave:modsecurity:3.0.4:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    trustwave modsecurity *
    debian debian linux 10.0
    trustwave modsecurity 3.0.0
    trustwave modsecurity 3.0.1
    trustwave modsecurity 3.0.2
    trustwave modsecurity 3.0.3
    trustwave modsecurity 3.0.4