CVE-2020-1693Public exploitNetwork attack vector

Unauthenticated file disclosure via XML entity expansion

Published Feb 17, 2020 · Updated Aug 4, 2024

XML external entity processing in Spacewalk 2.9 and earlier allows remote attackers to read files or interrupt service via /rpc/api. The redstone-xmlrpc XmlRpcParser accepts document type declarations and resolves attacker-supplied entities while parsing XML-RPC requests. The endpoint is reachable without authentication; entity expansion can exhaust resources, and parser responses can disclose file contents.

CVSS severity8.6
High
EPSS probability4.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML external entity processing in Spacewalk 2.9 and earlier allows remote attackers to read files or interrupt service via /rpc/api. The redstone-xmlrpc XmlRpcParser accepts document type declarations and resolves attacker-supplied entities while parsing XML-RPC requests. The endpoint is reachable without authentication; entity expansion can exhaust resources, and parser responses can disclose file contents.

The record

CVE
CVE-2020-1693
Published
Feb 17, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Spacewalk
Classifications
CWE-611, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=All spacewalk versions up 2.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Spacewalkversion=All spacewalk versions up 2.9

Published CVSS scores

8.6Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1190Exploit Public-Facing Application

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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