CVE-2021-41115

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-41115
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41115.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-41115
Related
  • GHSA-4h36-mqfq-42jg
Published
2021-10-07T23:15:08Z
Modified
2025-01-15T02:05:01.029622Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Zulip is an open source team chat server. In affected versions Zulip allows organization administrators on a server to configure "linkifiers" that automatically create links from messages that users send, detected via arbitrary regular expressions. Malicious organization administrators could subject the server to a denial-of-service via regular expression complexity attacks; most simply, by configuring a quadratic-time regular expression in a linkifier, and sending messages that exploited it. A regular expression attempted to parse the user-provided regexes to verify that they were safe from ReDoS -- this was both insufficient, as well as itself subject to ReDoS if the organization administrator entered a sufficiently complex invalid regex. Affected users should upgrade to the just-released Zulip 4.7, or main.

References

Affected packages

Git / github.com/zulip/zulip

Affected ranges

Type
GIT
Repo
https://github.com/zulip/zulip
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
Fixed

Affected versions

1.*

1.3.0
1.3.1
1.3.10
1.3.11
1.3.12
1.3.13
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
1.4.0
1.5.0
1.6.0
1.7.0
1.8.0
1.8.0-rc1
1.9.0
1.9.0-rc2
1.9.0-rc3

2.*

2.0.0
2.0.0-rc1
2.1-dev
2.1.0
2.1.0-rc1
2.2-dev

3.*

3.0
3.0-dev
3.0-rc1
3.0-rc2

4.*

4.0
4.0-dev
4.1
4.2
4.3
4.4
4.5
4.6

enterprise-1.*

enterprise-1.1.5
enterprise-1.2.0

shared-0.*

shared-0.0.1
shared-0.0.2
shared-0.0.3
shared-0.0.4
shared-0.0.5