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CVE

CVE-2023-28853

Mastodon is a free, open-source social network server based on ActivityPub Mastodon allows configuration of LDAP for aut

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.

HIGH · CVSS 7.7 EPSS 0.01147
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  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
▤

Affected Products & Versions

3
joinmastodon mastodon>= 2.5.0 and < 3.5.8
joinmastodon mastodon>= 4.0.0 and < 4.0.4
joinmastodon mastodon>= 4.1.0 and < 4.1.2
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-38g9-pfm9-gfqvgithub.com
▣

Scoring & Timeline

7.7
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Apr 2023 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2023/07/06/6
https://github.com/mastodon/mastodon/blob/94cbd808b5b3e7999c7e77dc724b7e8c9dd2bdec/app/models/concerns/ldap_authenticable.rb#L7-L14Product
https://github.com/mastodon/mastodon/blob/94cbd808b5b3e7999c7e77dc724b7e8c9dd2bdec/config/initializers/devise.rb#L398-L414Product
https://github.com/mastodon/mastodon/pull/24379Patch
https://github.com/mastodon/mastodon/releases/tag/v3.5.8Release Notes
https://github.com/mastodon/mastodon/releases/tag/v4.0.4Release Notes
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