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

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

Details

Source: MITRE

Published: 2019-09-18

Updated: 2019-09-18

Type: CWE-400

Risk Information

CVSS v2.0

Base Score: 4

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

Impact Score: 2.9

Exploitability Score: 8

Severity: MEDIUM