CVE-2017-16895: The (1) arq_updater, (2) arqcommitter, (3) standardrestorer, (4) arqglacierrestorer, and (5) arqs3glacierresto

This month

HIGH 7.8UPGRADE

CVE-2017-16895 is a high-severity flaw (CVSS 7.8) affecting arq. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The (1) arq_updater, (2) arqcommitter, (3) standardrestorer, (4) arqglacierrestorer, and (5) arqs3glacierrestorer helper apps in Arq 5.x before 5.10 for Mac allow local users to gain root privileges via a crafted data packet.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-732
Published	2017-12-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: arqbackup

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-12-01 17:29 UTCPublished CVE record published
2026-06-17 01:10 UTCUpdated Record last modified

arqbackup arq UPGRADE

Affected: >= 5.0.0.65 and < 5.10

Fixed in: 5.10

Safe to downgrade to: a release before 5.0.0.65

1. Check installed version

apt-cache policy arq || rpm -q arq || arq --version

2. UPGRADE to 5.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arq

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arq

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.0.0.65 (Debian / Ubuntu)

apt-cache madison arq sudo apt install arq=<VERSION_BEFORE_5.0.0.65> sudo apt-mark hold arq

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list arq sudo dnf downgrade arq-<VERSION_BEFORE_5.0.0.65> sudo dnf versionlock add arq

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Arq 5.9.7 - Local Privilege Escalation

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-16895?

arq: upgrade to 5.10. Exact commands for each OS are on this page.

Is CVE-2017-16895 being exploited?

CVE-2017-16895 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-16895 affect?

CVE-2017-16895 affects arq. Severity is high (CVSS 7.8). The (1) arq_updater, (2) arqcommitter, (3) standardrestorer, (4) arqglacierrestorer, and (5) arqs3glacierrestorer helper apps in Arq 5.x before 5.10 for Mac allow local users to gain root privileges via a crafted data packet.

How urgent is CVE-2017-16895?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2017-16945 HIGH 7.8 UPGRADE The standardrestorer binary in Arq 5.10 and earlier for Mac allows local users to write to arbitrary files and
CVE-2017-16928 HIGH 7.8 UPGRADE The arq_updater binary in Arq 5.10 and earlier for Mac allows local users to write to arbitrary files and cons
CVE-2017-15357 HIGH 7.4 UPGRADE The setpermissions function in the auto-updater in Arq before 5.9.7 for Mac allows local users to gain root pr

References

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