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CVE-2020-5211— NetHack AUTOCOMPLETE configuration file option is subject to a buffer overflow

Quick assessment

Affected
NetHack NetHack
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.

NetHack是一款角色扮演类单人游戏。 NetHack 3.6.5之前版本中的AUTOCOMPLETE配置文件选项存在缓冲区错误漏洞。远程攻击者可借助特制请求利用该漏洞导致拒绝服务或提升权限。

CVSS 5.0 · Medium EPSS 1.08% · P64
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I. Basic Information for CVE-2020-5211

Vulnerability Information
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Vulnerability Title
NetHack AUTOCOMPLETE configuration file option is subject to a buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
In NetHack before 3.6.5, an invalid extended command in value for the AUTOCOMPLETE configuration file option can cause a buffer overflow resulting in a crash or remote code execution/privilege escalation. This vulnerability affects systems that have NetHack installed suid/sgid and shared systems that allow users to upload their own configuration files. Users should upgrade to NetHack 3.6.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
NetHack 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NetHack是一款角色扮演类单人游戏。 NetHack 3.6.5之前版本中的AUTOCOMPLETE配置文件选项存在缓冲区错误漏洞。远程攻击者可借助特制请求利用该漏洞导致拒绝服务或提升权限。
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
NetHack NetHack < 3.6.5 -

II. Public POCs for CVE-2020-5211

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III. Intelligence Information for CVE-2020-5211

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Same Patch Batch · NetHack · 2020-01-28 · 6 CVEs total

CVE-2020-5209 5.0 MEDIUM NetHack command line parsing of options starting with -de and -i is subject to a buffer ov
CVE-2020-5210 5.0 MEDIUM NetHack command line -w option parsing is subject to a buffer overflow
CVE-2020-5212 5.0 MEDIUM NetHack MENUCOLOR configuration file option is subject to a buffer overflow
CVE-2020-5213 5.0 MEDIUM NetHack SYMBOL configuration file option is subject to a buffer overflow
CVE-2020-5214 5.0 MEDIUM NetHack error recovery after syntax error in configuration file is subject to a buffer ove

IV. Related Vulnerabilities

Same product: NetHack
Same vendor: NetHack
Same weakness: CWE-120

V. Comments for CVE-2020-5211

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