Is CVE-2019-11555 in the CISA KEV catalog?

No. CVE-2019-11555 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-11555?

CVE-2019-11555 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2019-11555?

CVE-2019-11555 has an EPSS score of 3.25% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-11555?

Upgrade wpa on debian 11 to 2:2.7+git20190128+0c1e29f-5 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2019-11555

MEDIUMEPSS 87th pctl

5.9

CVSS v3

NVD

Description

The EAP-pwd implementation in hostapd (EAP server) before 2.8 and wpa_supplicant (EAP peer) before 2.8 does not validate fragmentation reassembly state properly for a case where an unexpected fragment could be received. This could result in process termination due to a NULL pointer dereference (denial of service). This affects eap_server/eap_server_pwd.c and eap_peer/eap_pwd.c.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

wpaDebian

Fixed in:2:2.7+git20190128+0c1e29f-5CVE-2019-11555

hostapdUbuntu

Fixed in:2.1-0ubuntu1.7+esm1USN-3969-2

Fixed in:1:2.4-0ubuntu6.5USN-3969-1

Fixed in:2:2.6-15ubuntu2.3USN-3969-1

wpaUbuntu

Fixed in:2.1-0ubuntu1.7+esm1USN-3969-2

Fixed in:2.4-0ubuntu6.5USN-3969-1

Fixed in:2:2.6-15ubuntu2.3USN-3969-1

wpasupplicantUbuntu

Fixed in:2.1-0ubuntu1.7+esm1USN-3969-2

Fixed in:2.4-0ubuntu6.5USN-3969-1

Fixed in:2:2.6-15ubuntu2.3USN-3969-1

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

3.25%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch3

Vendor Advisory1

w1.fi

Other references11

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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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.