THREATPORT/VULNERABILITY/CVE-2019-19906
HIGH SEVERITY

CVE-2019-19906

Cyrus Sasl vulnerability

CVSS
7.5
EPSS
8.0%
EPSS pct
94th
Exploited
No known
cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated remote denial-of-service in OpenLDAP via a malformed LDAP packet. The OpenLDAP crash is ultimately caused by an off-by-one error in _sasl_add_string in common.c in cyrus-sasl.
Affected vendor
Cyrusimap
Affected product
Cyrus Sasl
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2019-12-19

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 8.0% 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-2019-19906

  • Confirm whether Cyrusimap Cyrus Sasl is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-19906.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-19906

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-19906 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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