Vulnerability CVE-2019-14993

Vulnerability Name:

CVE-2019-14993 (CCN-165240)

Assigned:

2018-06-15

Published:

2018-06-15

Updated:

2019-08-16

Summary:

Istio before 1.1.13 and 1.2.x before 1.2.4 mishandles regular expressions for long URIs, leading to a denial of service during use of the JWT, VirtualService, HTTPAPISpecBinding, or QuotaSpecBinding API.

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)
6.8 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:P/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

4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
3.7 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Local 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

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

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

Vulnerability Type:

CWE-185

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2019-14993

Source: MISC
Type: Vendor Advisory
https://discuss.istio.io/t/upcoming-security-updates-in-istio-1-2-4-and-1-1-13/3383

Source: XF
Type: UNKNOWN
istio-cve201914993-dos(165240)

Source: CCN
Type: GCC Bugzilla - Bug 86164
std::regex crashes when matching long lines

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86164

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://github.com/envoyproxy/envoy/issues/7728

Source: CCN
Type: istio GIT Repository
Releases · istio/istio · GitHub

Source: CONFIRM
Type: Vendor Advisory
https://istio.io/blog/2019/istio-security-003-004/

Vulnerable Configuration:

Configuration 1:

cpe:/a:istio:istio:*:*:*:*:*:*:*:* (Version < 1.1.13)

OR cpe:/a:istio:istio:*:*:*:*:*:*:*:* (Version >= 1.2.0 and < 1.2.4)

Configuration CCN 1:

cpe:/a:istio:istio:1.1.12:*:*:*:*:*:*:*

OR cpe:/a:istio:istio:1.2.3:*:*:*:*:*:*:*

Denotes that component is vulnerable

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