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CVE-2019-3883

HIGHCVSS 7.5/10EPSS 8.43%

Last modified

CVE-2019-3883 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. EPSS estimates a 8.43% chance of exploitation in the next 30 days.

Description

In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
8.43%

94.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Fedoraproject389 Directory Server<= 1.4.1.2
DebianDebian Linux8.0
RedhatEnterprise Linux6.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-3883?
In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout' seconds. However this timeout applies only for un-encrypted requests. Connections using SSL/TLS are not taking this timeout into account during reads, and may hang longer.An unauthenticated attacker could repeatedly create hanging LDAP requests to hang all the workers, resulting in a Denial of Service.
How severe is CVE-2019-3883?
CVE-2019-3883 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 8.43% probability of exploitation in the next 30 days.
How do I fix CVE-2019-3883?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-3883?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST