CVE-2023-20236 — Improper Verification of Cryptographic Signature in Cisco IOS XR

CWE-347 — Improper Verification of Cryptographic Signature CWE-345 — Insufficient Verification of Data Authenticity4 documents4 sources

Severity

7.8HIGHNVD

CNA6.7

EPSS

0.0%

top 97.06%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Cisco IOS XR Cisco IOS XR Software

Timeline

PublishedSep 13

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages2 packages

▶CVEListV5cisco/cisco_ios_xr_software87 versions+86

▶NVDcisco/ios_xr< 7.10.1

🔴Vulnerability Details

GHSA

GHSA-j2wp-f4r8-6834: A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software imag↗2023-09-13

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CVEList

CVE-2023-20236: A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software imag↗2023-09-13

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📋Vendor Advisories

Cisco

Cisco IOS XR Software iPXE Boot Signature Bypass Vulnerability↗2023-09-13

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