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CVE-2024-5742— Nano: running `chmod` and `chown` on the filename allows malicious user to replace the emergency file with a malicious symlink to a root-owned file

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
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.

Nano是Nano开源的一个文本编辑器。 Nano存在安全漏洞，该漏洞源于允许通过不安全的临时文件进行可能的特权升级。

CVSS 6.7 · Medium EPSS 0.34% · P25
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I. Basic Information for CVE-2024-5742

Vulnerability Information
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Vulnerability Title
Nano: running `chmod` and `chown` on the filename allows malicious user to replace the emergency file with a malicious symlink to a root-owned file
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in GNU Nano that allows a possible privilege escalation through an insecure temporary file. If Nano is killed while editing, a file it saves to an emergency file with the permissions of the running user provides a window of opportunity for attackers to escalate privileges through a malicious symlink.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Nano 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nano是Nano开源的一个文本编辑器。 Nano存在安全漏洞，该漏洞源于允许通过不安全的临时文件进行可能的特权升级。
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
Red Hat Red Hat Enterprise Linux 8 0:2.9.8-3.el8_10 ~ * cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 9 0:5.6.1-6.el9 ~ * cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7

II. Public POCs for CVE-2024-5742

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III. Intelligence Information for CVE-2024-5742

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Vendor Advisories for CVE-2024-5742 (2)

Mailing List Discussions for CVE-2024-5742 (1)

IV. Related Vulnerabilities

Same weakness: CWE-59

V. Comments for CVE-2024-5742

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