CVE Vulnerability

CVE-2019-16215

The Markdown parser in Zulip server before 2.0.5 used a regular expression vulnerable to exponential backtracking. A user who is logged into the server could send a crafted message causing the server to spend an effectively arbitrary amount of CPU time and stall the processing of future messages.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/ Vendor Advisory
https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*
Information

Published : 2019-09-18 12:15

Updated : 2019-09-18 06:27

NVD link : CVE-2019-16215

Mitre link : CVE-2019-16215

Products Affected
No products.
CWE
CWE-1333

Inefficient Regular Expression Complexity