CVE-2022-21952Public exploitNetwork attack vector

Unauthenticated disk exhaustion via unthrottled log writes

Published Jun 22, 2022 · Updated Jul 7, 2026

Missing authentication in spacewalk-java in SUSE Manager Server 4.1 and 4.2 allows remote attackers to exhaust server disk space. The unauthenticated /rhn/manager/frontend-log endpoint accepts attacker-controlled POSTed level and message values and appends them without throttling to /var/log/rhn/rhn_web_frontend.log. Repeated large requests grow the unrotated log until available disk space is exhausted, interrupting the server without affecting confidentiality or integrity.

CVSS severity7.5
High
EPSS probability1.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in spacewalk-java in SUSE Manager Server 4.1 and 4.2 allows remote attackers to exhaust server disk space. The unauthenticated /rhn/manager/frontend-log endpoint accepts attacker-controlled POSTed level and message values and appends them without throttling to /var/log/rhn/rhn_web_frontend.log. Repeated large requests grow the unrotated log until available disk space is exhausted, interrupting the server without affecting confidentiality or integrity.

The record

CVE
CVE-2022-21952
Published
Jun 22, 2022
Updated
Jul 7, 2026
Vendor
NeuVector
Product
SUSE Manager Server
Classifications
CWE-306, T1499.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=spacewalk-java <4.1.46
  2. Affected versionversion=spacewalk-java <4.2.37

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NeuVector · SUSE Manager Serverversion=spacewalk-java <4.1.46; version=spacewalk-java <4.2.37

Published CVSS scores

7.5SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CNA SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0National Vulnerability DatabaseAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1499.001OS Exhaustion Flood

Public exploit references

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

Technologies

Your stack

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Your stack

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