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CVE-2019-16215

MEDIUMCVSS 6.5/10EPSS 1.25%

Last modified

CVE-2019-16215 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.25%

65.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ZulipZulip Server< 2.0.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2019-16215?
CVE-2019-16215 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.25% probability of exploitation in the next 30 days.
How do I fix CVE-2019-16215?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16215?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST