Is CVE-2019-18976 in the CISA KEV catalog?

No. CVE-2019-18976 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-18976?

CVE-2019-18976 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-18976?

CVE-2019-18976 has an EPSS score of 6.68% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-18976?

Upgrade asterisk on debian 11 to 1:16.1.1~dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2019-18976

HIGHEPSS 93th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

asteriskDebian

Fixed in:1:16.1.1~dfsg-1CVE-2019-18976

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

6.68%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory4

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.