Is CVE-2019-19906 in the CISA KEV catalog?

No. CVE-2019-19906 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-19906?

CVE-2019-19906 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-19906?

CVE-2019-19906 has an EPSS score of 8.04% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-19906?

Upgrade cyrus-sasl2 on debian 11 to 2.1.27+dfsg-2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2019-19906

HIGHEPSS 94th pctl

7.5

CVSS v3

NVD

Description

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.

CWE-193 CWE-787Out-of-bounds Write

How to fix

Remediation Available

cyrus-sasl2Debian

Fixed in:2.1.27+dfsg-2CVE-2019-19906

cyrus-sasl2Ubuntu

Fixed in:2.1.25.dfsg1-17ubuntu0.1~esm1USN-4256-1

Fixed in:2.1.26.dfsg1-14ubuntu0.2USN-4256-1

Fixed in:2.1.27~101-g0780600+dfsg-3ubuntu2.1USN-4256-1

libsasl2-2Ubuntu

Fixed in:2.1.25.dfsg1-17ubuntu0.1~esm1USN-4256-1

Fixed in:2.1.26.dfsg1-14ubuntu0.2USN-4256-1

Fixed in:2.1.27~101-g0780600+dfsg-3ubuntu2.1USN-4256-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

8.04%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch3

Exploit1

openldap.org

Third-Party Advisory7

Other references4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.