Is CVE-2022-40318 in the CISA KEV catalog?

No. CVE-2022-40318 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-40318?

CVE-2022-40318 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2022-40318?

CVE-2022-40318 has an EPSS score of 1.98% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-40318?

Upgrade frr on debian 11 to 7.5.1-1.1+deb11u2 or later. Fixes are available for 9 affected products.

CVE & CISA-KEV Catalog

CVE-2022-40318

MEDIUMEPSS 78th pctl

6.5

CVSS v3

NVD

Description

An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case. NOTE: this behavior occurs in bgp_open_option_parse in the bgp_open.c file, a different location (with a different attack vector) relative to CVE-2022-40302.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

frrDebian

Fixed in:7.5.1-1.1+deb11u2CVE-2022-40318

Fixed in:8.4.1-1CVE-2022-40318

frrRocky

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frrRed Hat / RHEL

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frr-debuginfoRocky

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frr-debuginfoRed Hat / RHEL

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frr-debugsourceRed Hat / RHEL

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frr-debugsourceRocky

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frr-selinuxRocky

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

frr-selinuxRed Hat / RHEL

Fixed in:0:8.3.1-11.el9_3RHSA-2023:6434

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.98%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Third-Party Advisory3

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	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.