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CVE-2021-47764— AbsoluteTelnet 11.24 - 'Phone' Denial of Service (PoC)

Quick assessment

Affected
Celestialsoftware AbsoluteTelnet
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.

Celestial AbsoluteTelnet是美国Celestial公司的一款Telnet/SSH终端客户端软件。 Celestial AbsoluteTelnet 11.24版本存在缓冲区错误漏洞，该漏洞源于操纵DialUp连接和许可证名字段，可能导致本地攻击者使应用程序崩溃。

CVSS 5.5 · Medium EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2021-47764

Vulnerability Information
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Vulnerability Title
AbsoluteTelnet 11.24 - 'Phone' Denial of Service (PoC)
Source: CVE Program / CVE List V5
Vulnerability Description
AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating DialUp connection and license name fields. Attackers can generate a 1000-character payload and paste it into specific input fields to trigger application crashes and force unexpected termination.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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
Celestial AbsoluteTelnet 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Celestial AbsoluteTelnet是美国Celestial公司的一款Telnet/SSH终端客户端软件。 Celestial AbsoluteTelnet 11.24版本存在缓冲区错误漏洞，该漏洞源于操纵DialUp连接和许可证名字段，可能导致本地攻击者使应用程序崩溃。
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
Celestialsoftware AbsoluteTelnet 11.24 -

II. Public POCs for CVE-2021-47764

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III. Intelligence Information for CVE-2021-47764

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IV. Related Vulnerabilities

Same product: AbsoluteTelnet
Same vendor: Celestialsoftware
Same weakness: CWE-787

V. Comments for CVE-2021-47764

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