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CVE-2023-20236

MEDIUM
Published 2023-09-13T16:39:19.418Z
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Expert Analysis

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CVSS Score

V3.1
6.7
/10
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.019
Higher than 1.9% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device.

This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Cisco

Cisco IOS XR Software

Affected Versions:

5.2.0 5.2.1 5.2.2 5.2.4 5.2.3 5.2.5 5.2.47 5.3.0 5.3.1 5.3.2 5.3.3 5.3.4 6.0.0 6.0.1 6.0.2 6.1.1 6.1.2 6.1.3 6.1.4 6.1.12 6.1.22 6.1.32 6.1.36 6.1.42 6.2.1 6.2.2 6.2.3 6.2.25 6.2.11 6.3.2 6.3.3 6.3.15 6.4.1 6.4.2 6.4.3 6.5.1 6.5.2 6.5.3 6.5.25 6.5.26 6.5.28 6.5.29 6.5.32 6.5.33 6.6.2 6.6.3 6.6.25 6.6.4 7.0.1 7.0.2 7.0.12 7.0.14 7.1.1 7.1.15 7.1.2 7.1.3 6.7.1 6.7.2 6.7.3 6.7.4 7.2.0 7.2.1 7.2.2 7.3.1 7.3.15 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 7.6.1 7.6.2 7.7.1 7.7.2 7.7.21 6.9.1 6.9.2 7.8.1 7.8.2 7.9.1 7.9.2
cisco

ios_xr_software

Affected Versions:

0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-j2wp-f4r8-6834

Advisory Details

A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device. This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-20236
WEB https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB

Advisory provided by GitHub Security Advisory Database. Published: September 13, 2023, Modified: January 25, 2024

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB
Published: 2023-09-13T16:39:19.418Z
Last Modified: 2024-10-23T19:10:48.388Z
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