6.1

CVE-2022-20849: cisco cisco ios xr software Unchecked Error Condition

CVSS: 6.1v3.1MediumAnalyzed
Published 15-11-2024Last modified 15-11-2024
Open JSON

Vulnerability summary

CVE-2022-20849 is a medium (CVSS 6.1) Unchecked Error Condition vulnerability in cisco cisco ios xr software. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 18.8% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.28%
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. 15-11-2024
    PublishedVulnerability first disclosed.
  2. 15-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the PPPoE process to continually crash. This vulnerability exists because the PPPoE feature does not properly handle an error condition within a specific crafted packet sequence. An attacker could exploit this vulnerability by sending a sequence of specific PPPoE packets from controlled customer premises equipment (CPE). A successful exploit could allow the attacker to cause the PPPoE process to continually restart, resulting in a denial of service condition (DoS).Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2022 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see .

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.28% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.28%

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

Cisco2 products
  • cisco ios xr software6.5.3 | 6.6.1 | 6.5.15 | 7.0.1 | 6.6.25 | 6.6.2 | 6.5.1 | 6.5.2 | 7.1.1 | 7.0.90 | 6.6.3 | 6.7.1 | 7.0.2 | 7.1.15 | 7.1.2 | 7.2.1 | 6.7.2 | 7.1.25 | 6.6.4 | 7.3.1 | 7.1.3 | 6.7.3 | 7.4.1 | 7.2.2 | 6.8.1 | 7.3.2 | 7.5.1 | 7.3.3 | 6.8.2 | 7.3.4 | 7.4.2 | 6.7.35 | 6.9.1
  • ios_xr6.5.1 | 6.5.2 | 6.5.3 | 6.5.15 | 6.6.1 | 6.6.2 | 6.6.3 | 6.6.4 | 6.6.25 | 6.7.1 | 6.7.2 | 6.7.3 | 6.7.35 | 6.8.1 | 6.8.2 | 6.9.1 | 7.0.1 | 7.0.2 | 7.0.90 | 7.1.1 | 7.1.2 | 7.1.3 | 7.1.15 | 7.1.25 | 7.2.1 | 7.2.2 | 7.3.1 | 7.3.2 | 7.3.3 | 7.3.4 | 7.4.1 | 7.4.2 | 7.5.1

1 vendor · 2 products

References

1 links