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CVE-2023-4255— W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)

Quick assessment

Affected
n/a w3m
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.

w3m是Tatsuya Kinoshita个人开发者的一种具有 WWW 功能的寻呼机。 W3M 存在安全漏洞，该漏洞源于etc.c 中 checkType() 函数的退格处理中发现了越界写入问题，可以通过向 w3m 二进制文件提供特制 HTML 文件触发，攻击者利用该漏洞可能会导致应用程序崩溃，从而导致拒绝服务。

CVSS 5.5 · Medium EPSS 0.32% · P24

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2023-4255

Vulnerability Information
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Vulnerability Title
W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)
Source: CVE Program / CVE List V5
Vulnerability Description
An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
w3m 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
w3m是Tatsuya Kinoshita个人开发者的一种具有 WWW 功能的寻呼机。 W3M 存在安全漏洞，该漏洞源于etc.c 中 checkType() 函数的退格处理中发现了越界写入问题，可以通过向 w3m 二进制文件提供特制 HTML 文件触发，攻击者利用该漏洞可能会导致应用程序崩溃，从而导致拒绝服务。
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
- w3m - -
Fedora Fedora - -
Fedora Extra Packages for Enterprise Linux - -

II. Public POCs for CVE-2023-4255

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III. Intelligence Information for CVE-2023-4255

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Patches & Fixes for CVE-2023-4255 (2)

Vendor Advisories for CVE-2023-4255 (1)

Mailing List Discussions for CVE-2023-4255 (3)

Other References for CVE-2023-4255 (1)

Same Patch Batch · n/a · 2023-12-21 · 21 CVEs total

CVE-2023-7037 6.3 MEDIUM automad FileController.php import server-side request forgery
CVE-2023-4256 5.5 MEDIUM Tcpreplay: tcprewrite: double free in tcpedit_dlt_cleanup() in plugins/dlt_plugins.c
CVE-2023-7036 4.7 MEDIUM automad Content Type FileCollectionController.php upload unrestricted upload
CVE-2023-7038 4.3 MEDIUM automad User Creation cross-site request forgery
CVE-2023-7035 2.4 LOW automad Setting post.php cross site scripting
CVE-2023-51048 S-CMS 安全漏洞
CVE-2023-51052 S-CMS 安全漏洞
CVE-2023-51051 S-CMS 安全漏洞
CVE-2023-51050 S-CMS 安全漏洞
CVE-2023-51049 S-CMS 安全漏洞
CVE-2023-29485 Heimdal 安全漏洞
CVE-2023-50481 blinksocks 安全漏洞
CVE-2023-50477 nOS Client 安全漏洞
CVE-2023-50475 Bcoin 安全漏洞
CVE-2023-50473 qBit MatUI 安全漏洞
CVE-2023-48116 SmarterTools SmarterMail 安全漏洞
CVE-2023-48115 SmarterTools SmarterMail 安全漏洞
CVE-2023-48114 SmarterTools SmarterMail 安全漏洞
CVE-2023-29487 Heimdal 安全漏洞
CVE-2023-29486 Heimdal 安全漏洞

IV. Related Vulnerabilities

Same product: w3m
Same vendor: n/a
Same weakness: CWE-787

V. Comments for CVE-2023-4255

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