CVE-2017-7643: Proxifier for Mac before 2.19 allows local users to gain privileges via the first parameter to the KLoader set

Q: How do I fix CVE-2017-7643?

proxifier: upgrade to 2.19. Exact commands for each OS are on this page.

Q: Is CVE-2017-7643 being exploited?

CVE-2017-7643 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-7643 affect?

CVE-2017-7643 affects proxifier. Severity is high (CVSS 7.8). Proxifier for Mac before 2.19 allows local users to gain privileges via the first parameter to the KLoader setuid program.

Q: How urgent is CVE-2017-7643?

Priority 48/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2017-7643 is a high-severity flaw (CVSS 7.8) affecting proxifier. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Proxifier for Mac before 2.19 allows local users to gain privileges via the first parameter to the KLoader setuid program.

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 38%)
CISA exploited list	No
Published	2017-04-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: proxifier

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

Am I affected?

Timeline

2017-04-14 14:59 UTCPublished CVE record published
2026-06-17 01:24 UTCUpdated Record last modified

proxifier proxifier UPGRADE

Affected: < 2.19

Fixed in: 2.19

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.19 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade proxifier

Note

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

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: Proxifier for Mac 2.17/2.18 - Privesc 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-2017-7643?

proxifier: upgrade to 2.19. Exact commands for each OS are on this page.

Is CVE-2017-7643 being exploited?

CVE-2017-7643 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-2017-7643 affect?

CVE-2017-7643 affects proxifier. Severity is high (CVSS 7.8). Proxifier for Mac before 2.19 allows local users to gain privileges via the first parameter to the KLoader setuid program.

How urgent is CVE-2017-7643?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2017-7690 HIGH 7.8 UPGRADE Proxifier for Mac before 2.19.2, when first run, allows local users to gain privileges by replacing the KLoade

References

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