7.4

CVE-2024-20318: cisco cisco ios xr software Improper Input Validation

CVSS: 7.4v3.1HighDeferred
Published 13-03-2024Last modified 01-08-2024
Open JSON

Vulnerability summary

CVE-2024-20318 is a high (CVSS 7.4) Improper Input Validation vulnerability in cisco cisco ios xr software. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-03-2024
    PublishedVulnerability first disclosed.
  2. 01-08-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the Layer 2 Ethernet services of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the line card network processor to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of specific Ethernet frames that are received on line cards that have the Layer 2 services feature enabled. An attacker could exploit this vulnerability by sending specific Ethernet frames through an affected device. A successful exploit could allow the attacker to cause the ingress interface network processor to reset, resulting in a loss of traffic over the interfaces that are supported by the network processor. Multiple resets of the network processor would cause the line card to reset, resulting in a DoS condition.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

0.00 pp

From 0.33% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco1 product
  • cisco ios xr software6.5.2 | 6.5.3 | 6.6.2 | 6.6.3 | 6.6.25 | 7.0.1 | 7.0.2 | 7.1.1 | 7.1.15 | 7.1.2 | 7.1.3 | 6.7.1 | 6.7.2 | 6.7.3 | 7.3.1 | 7.3.2 | 7.3.3 | 7.3.5 | 7.4.1 | 7.4.2 | 6.8.1 | 6.8.2 | 7.5.1 | 7.5.3 | 7.5.2 | 7.5.4 | 7.5.5 | 7.6.1 | 7.6.2 | 7.7.1 | 7.7.2 | 6.9.1 | 6.9.2 | 7.8.1 | 7.8.2 | 7.9.1

1 vendor · 1 product

References

1 links