CVE-2023-28853

Public Exploit
Mastodon's blind LDAP injection in login allows the attacker to leak arbitrary attributes from LDAP database

Description

Mastodon is a free, open-source social network server based on ActivityPub Mastodon allows configuration of LDAP for authentication. Starting in version 2.5.0 and prior to versions 3.5.8, 4.0.4, and 4.1.2, the LDAP query made during login is insecure and the attacker can perform LDAP injection attack to leak arbitrary attributes from LDAP database. This issue is fixed in versions 3.5.8, 4.0.4, and 4.1.2.

Categories

7.7
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.43%
Vendor Advisory github.com
Affected: mastodon mastodon
Published at:
Updated at:

References

Link Tags
https://github.com/mastodon/mastodon/security/advisories/GHSA-38g9-pfm9-gfqv vendor advisory exploit
https://github.com/mastodon/mastodon/pull/24379 patch
https://github.com/mastodon/mastodon/blob/94cbd808b5b3e7999c7e77dc724b7e8c9dd2bdec/app/models/concerns/ldap_authenticable.rb#L7-L14 product
https://github.com/mastodon/mastodon/blob/94cbd808b5b3e7999c7e77dc724b7e8c9dd2bdec/config/initializers/devise.rb#L398-L414 product
https://github.com/mastodon/mastodon/releases/tag/v3.5.8 release notes
https://github.com/mastodon/mastodon/releases/tag/v4.0.4 release notes
https://github.com/mastodon/mastodon/releases/tag/v4.1.2 release notes
http://www.openwall.com/lists/oss-security/2023/07/06/6

Frequently Asked Questions

What is the severity of CVE-2023-28853?
CVE-2023-28853 has been scored as a high severity vulnerability.
How to fix CVE-2023-28853?
To fix CVE-2023-28853, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-28853 being actively exploited in the wild?
It is possible that CVE-2023-28853 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28853?
CVE-2023-28853 affects mastodon mastodon.
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