CVE-2022-45141Network attack vector

Offline key attack via client-selected RC4-HMAC tickets

Published Mar 6, 2023 · Updated Mar 6, 2025

Weak Kerberos encryption in affected Heimdal builds of Samba AD DC allows remote attackers to obtain RC4-HMAC tickets for offline attack. The KDC lets a requesting client select RC4-HMAC despite the target server supporting AES, then returns a TGS-REP encrypted with the weaker key. Unauthenticated network access to Kerberos is enough; the returned ticket exposes the target server key to offline password guessing.

CVSS severity8.1
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Weak Kerberos encryption in affected Heimdal builds of Samba AD DC allows remote attackers to obtain RC4-HMAC tickets for offline attack. The KDC lets a requesting client select RC4-HMAC despite the target server supporting AES, then returns a TGS-REP encrypted with the weaker key. Unauthenticated network access to Kerberos is enough; the returned ticket exposes the target server key to offline password guessing.

The record

CVE
CVE-2022-45141
Published
Mar 6, 2023
Updated
Mar 6, 2025
Vendor
PPP Project
Product
Samba
Classifications
CWE-326, CWE-328, T1558.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Fixed in samba 4.15.13, samba 4.16.8, samba 4.15.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PPP Project · Sambaversion=Fixed in samba 4.15.13, samba 4.16.8, samba 4.15.13

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1Samba TeamCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1Amazon LinuxCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-326Inadequate Encryption Strength
CWE-328Use of Weak Hash
T1558.003Steal or Forge Kerberos Tickets: Kerberoasting

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo