Vulnerability Name:

CVE-2019-25043 (CCN-201759)

Assigned:2021-05-05
Published:2021-05-05
Updated:2021-05-14
Summary:ModSecurity 3.x before 3.0.4 mishandles key-value pair parsing, as demonstrated by a "string index out of range" error and worker-process crash for a "Cookie: =abc" header.
CVSS v3 Severity:5.3 Medium (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 (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
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-755
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-25043

Source: XF
Type: UNKNOWN
modsecurity-cve201925043-dos(201759)

Source: CCN
Type: ModSecurity GIT Repository
Cookie with empty key will crash ModSecurity worker process #2566

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/SpiderLabs/ModSecurity/issues/2566

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

    • Configuration CCN 1:
  • cpe:/a:trustwave:modsecurity:3.0.3:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    trustwave modsecurity *
    trustwave modsecurity 3.0.3