THREATPORT/VULNERABILITY/CVE-2019-3883
HIGH SEVERITY

CVE-2019-3883

389 Directory Server vulnerability

CVSS
7.5
EPSS
8.4%
EPSS pct
94th
Exploited
No known
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.
Affected vendor
Fedoraproject
Affected product
389 Directory Server
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-772 — Missing Release of Resource after Effective Lifetime
Published
2019-04-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 8.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2019-3883

  • Confirm whether Fedoraproject 389 Directory Server is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-3883.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-3883

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