CVE-2019-16215

medium

Description

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.

References

https://github.com/zulip/zulip/commit/5797f013b3be450c146a4141514bda525f2f1b51

https://blog.zulip.org/2019/09/11/zulip-server-2-0-5-security-release/

Details

Source: Mitre, NVD

Published: 2019-09-18

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium