CVE-2023-20881: Cloud foundry instances having CAPI version between 1.140 and 1.152.0 along with loggregator-agent v7+ may ove

Routine

HIGH 8.1UPGRADEUPGRADEUPGRADE

CVE-2023-20881 is a high-severity flaw (CVSS 8.1) affecting capi-release, cf-deployment, loggregator-agent. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cloud foundry instances having CAPI version between 1.140 and 1.152.0 along with loggregator-agent v7+ may override other users syslog drain credentials if they're aware of the client certificate used for that syslog drain. This applies even if the drain has zero certs. This would allow the user to override the private key and add or modify a certificate authority used for the connection.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-295
Published	2023-05-19
Last modified	2026-06-17

Publisher (CNA): VMware · Vendor: cloudfoundry

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

Am I affected?

Timeline

2023-05-19 15:15 UTCPublished CVE record published
2026-06-17 05:31 UTCUpdated Record last modified

cloudfoundry capi-release UPGRADE

Affected: >= 1.140 and <= 1.152.0

Fixed in: newer than 1.152.0

Safe to downgrade to: a release before 1.140

1. Check installed version

apt-cache policy capi-release || rpm -q capi-release || capi-release --version

2. UPGRADE to newer than 1.152.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade capi-release

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade capi-release

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 1.140 (Debian / Ubuntu)

apt-cache madison capi-release sudo apt install capi-release=<VERSION_BEFORE_1.140> sudo apt-mark hold capi-release

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

dnf --showduplicates list capi-release sudo dnf downgrade capi-release-<VERSION_BEFORE_1.140> sudo dnf versionlock add capi-release

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.

cloudfoundry cf-deployment UPGRADE

Affected: >= 24.7.0 and <= 29.0.0

Fixed in: newer than 29.0.0

Safe to downgrade to: a release before 24.7.0

1. Check installed version

apt-cache policy cf-deployment || rpm -q cf-deployment || cf-deployment --version

2. UPGRADE to newer than 29.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cf-deployment

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cf-deployment

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 24.7.0 (Debian / Ubuntu)

apt-cache madison cf-deployment sudo apt install cf-deployment=<VERSION_BEFORE_24.7.0> sudo apt-mark hold cf-deployment

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

dnf --showduplicates list cf-deployment sudo dnf downgrade cf-deployment-<VERSION_BEFORE_24.7.0> sudo dnf versionlock add cf-deployment

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.

cloudfoundry loggregator-agent UPGRADE

Affected: >= 7.0 and <= 7.2.1

Fixed in: newer than 7.2.1

Safe to downgrade to: a release before 7.0

1. Check installed version

apt-cache policy loggregator-agent || rpm -q loggregator-agent || loggregator-agent --version

2. UPGRADE to newer than 7.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade loggregator-agent

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade loggregator-agent

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 7.0 (Debian / Ubuntu)

apt-cache madison loggregator-agent sudo apt install loggregator-agent=<VERSION_BEFORE_7.0> sudo apt-mark hold loggregator-agent

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

dnf --showduplicates list loggregator-agent sudo dnf downgrade loggregator-agent-<VERSION_BEFORE_7.0> sudo dnf versionlock add loggregator-agent

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.

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-2023-20881?

capi-release: upgrade to newer than 1.152.0; cf-deployment: upgrade to newer than 29.0.0; loggregator-agent: upgrade to newer than 7.2.1. Exact commands for each OS are on this page.

Is CVE-2023-20881 being exploited?

CVE-2023-20881 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-2023-20881 affect?

CVE-2023-20881 affects capi-release, cf-deployment, loggregator-agent. Severity is high (CVSS 8.1). Cloud foundry instances having CAPI version between 1.140 and 1.152.0 along with loggregator-agent v7+ may override other users syslog drain credentials if they're aware of the client certificate used for that syslog drain. This applies eve

How urgent is CVE-2023-20881?

Priority 36/100. High severity

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References

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