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Arcserve BackupApplication · Ca

CVE-2000-0781

HIGH · 7.2 CVSS v2.0 Published 2000-10-20
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
77/100
Remediation priority · High
No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
uagentsetup in ARCServeIT Client Agent 6.62 does not properly check for the existence or ownership of a temporary file which is moved to the agent.cfg configuration file, which allows local users to execute arbitrary commands by modifying the temporary file before it is moved.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The uagentsetup utility in ARCServeIT Client Agent 6.62 suffers from a time-of-check-time-of-use (TOCTOU) race condition when handling a temporary file that gets moved to the agent.cfg configuration file. The application fails to verify file existence or ownership before the move operation, allowing a local attacker to substitute a malicious file via symlink or pre-existing file manipulation and achieve arbitrary command execution with elevated privileges.

MitigationThis vulnerability affects a 2000-era legacy application that is likely end-of-life. Organizations should identify and remove affected installations if possible. If continued use is required, implement strict filesystem controls around the agent working directory to prevent untrusted file manipulation, or replace the software with a supported alternative.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Arcserve BackupApplication
Affected:= 6.63_linux

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:L/AC:L/Au:N/C:C/I:C/A:C

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check if Ca Arcserve Backup is installed
    Locate the Ca Arcserve Backup installation directory and identify the installed version by querying the package or binary version information
    Affected if The installed version is 6.63_linux
  2. Verify the uagentsetup utility is present
    Search for the uagentsetup or uagentsetup.exe binary in the installation directory, typically under the Client Agent or agent subdirectory
    Affected if The uagentsetup utility exists and is executable in the expected installation path
  3. Identify the agent working directory
    Locate the directory where uagentsetup creates temporary files and where agent.cfg is stored. Common paths include /opt/caarcserve/ or installation-root directories
    Affected if A working directory containing agent.cfg and temporary file handling is present
  4. Inspect filesystem permissions on the agent directory
    Use 'ls -la' or equivalent command to list ownership and permissions on the directory where uagentsetup operates and creates temporary files
    Affected if The directory has weak permissions allowing untrusted users to create or modify files (world-writable or owned by a different user than the agent runs as)
  5. Check for symlinks in the working directory
    Use 'ls -la' and 'find' commands to identify any symbolic links pointing to the agent.cfg file or temporary files in the agent working directory
    Affected if Symlinks exist that could redirect the temporary file or agent.cfg to an attacker-controlled location

A system is affected if Ca Arcserve Backup version 6.63_linux is installed, the uagentsetup utility is present, and the agent working directory has weak permissions allowing untrusted file manipulation.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

This vulnerability affects a 2000-era legacy application that is likely end-of-life. Organizations should identify and remove affected installations if possible. If continued use is required, implement strict filesystem controls around the agent working directory to prevent untrusted file manipulation, or replace the software with a supported alternative.

Fix this in Arcserve Backup Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2000-0781 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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