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CVE-2023-20135

Quick assessment

Affected
Cisco Cisco IOS XR Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco IOS和Cisco IOS XR都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 存在安全漏洞，该漏洞源于映像验证检查过程中存在代码执行漏洞。经过身份验证的攻击者可利用该漏洞在底层操作系统上执行任意代码。

CVSS 5.7 · Medium EPSS 0.09% · P1
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I. Basic Information for CVE-2023-20135

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Cisco IOS XR Software image verification checks could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. This vulnerability is due to a time-of-check, time-of-use (TOCTOU) race condition when an install query regarding an ISO image is performed during an install operation that uses an ISO image. An attacker could exploit this vulnerability by modifying an ISO image and then carrying out install requests in parallel. A successful exploit could allow the attacker to execute arbitrary code on an affected device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS和Cisco IOS XR都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 存在安全漏洞，该漏洞源于映像验证检查过程中存在代码执行漏洞。经过身份验证的攻击者可利用该漏洞在底层操作系统上执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XR Software 7.5.3 -

II. Public POCs for CVE-2023-20135

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III. Intelligence Information for CVE-2023-20135

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Vendor Advisories for CVE-2023-20135 (1)

Same Patch Batch · Cisco · 2023-09-13 · 5 CVEs total

CVE-2023-20236 6.7 MEDIUM Cisco IOS XR 数据伪造问题漏洞
CVE-2023-20191 5.8 MEDIUM Cisco IOS XR 安全漏洞
CVE-2023-20190 5.8 MEDIUM Cisco IOS XR 安全漏洞
CVE-2023-20233 4.3 MEDIUM Cisco IOS XR 安全漏洞

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-347

V. Comments for CVE-2023-20135

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