CVE-2023-33965: Brook is a cross-platform programmable network tool

Q: How do I fix CVE-2023-33965?

brook: upgrade to 20230606. Exact commands for each OS are on this page.

Q: Is CVE-2023-33965 being exploited?

CVE-2023-33965 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-2023-33965 affect?

CVE-2023-33965 affects brook. Severity is critical (CVSS 9.6). Brook is a cross-platform programmable network tool. The `tproxy` server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local `tproxy` servi

Q: How urgent is CVE-2023-33965?

Priority 52/100. Critical severity

This month

CRITICAL 9.6UPGRADE

CVE-2023-33965 is a critical-severity flaw (CVSS 9.6) affecting brook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Brook is a cross-platform programmable network tool. The `tproxy` server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local `tproxy` service leading to remote code execution. A patch is available in version 20230606.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-78
Published	2023-06-01
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: txthinking

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

Am I affected?

Timeline

2023-06-01 15:15 UTCPublished CVE record published
2026-06-17 06:02 UTCUpdated Record last modified

txthinking brook UPGRADE

Affected: < 20230606

Fixed in: 20230606

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 20230606 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade brook

Note

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

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-2023-33965?

brook: upgrade to 20230606. Exact commands for each OS are on this page.

Is CVE-2023-33965 being exploited?

CVE-2023-33965 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-2023-33965 affect?

CVE-2023-33965 affects brook. Severity is critical (CVSS 9.6). Brook is a cross-platform programmable network tool. The `tproxy` server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local `tproxy` servi

How urgent is CVE-2023-33965?

Priority 52/100. Critical severity

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References

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