CVE-2021-45104Network attack vector

Job hijacking via cleartext daemon secrets

Published Apr 6, 2022 · Updated Aug 4, 2024

Cleartext secret transmission in HTCondor 9.0.x before 9.0.10 and 9.1.x before 9.5.1 allows remote attackers to hijack jobs. The Schedd daemon sends secret material in cleartext when BLOWFISH or 3DES is used with a Startd or Collector. Traffic capture between those daemons, weak encryption or an 8.8 peer, and match-password authentication are required; exposed secrets permit job replacement, private-data access, or bogus results.

CVSS severity7.4
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext secret transmission in HTCondor 9.0.x before 9.0.10 and 9.1.x before 9.5.1 allows remote attackers to hijack jobs. The Schedd daemon sends secret material in cleartext when BLOWFISH or 3DES is used with a Startd or Collector. Traffic capture between those daemons, weak encryption or an 8.8 peer, and match-password authentication are required; exposed secrets permit job replacement, private-data access, or bogus results.

The record

CVE
CVE-2021-45104
Published
Apr 6, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N
7.4NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

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

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Your stack

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