CVE-2021-40839: CVE-2021-40839

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I. Basic Information for CVE-2021-40839

Vulnerability Information

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Vulnerability Title

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Description

The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.

Source: NVD (National Vulnerability Database)

CVSS Information

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Type

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Title

Github rencode安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Github rencode是encode 模块类似于 BitTorrent 项目中的 bencode。对于具有许多小元素的复杂异构数据结构，r 编码占用的空间明显少于 b 编码。 rencode package 1.0.6及之前版本存在安全漏洞，该漏洞源于设备允许在类型代码解码中无限循环，从而启用消耗 CPU 和内存的远程攻击。

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
-	n/a	n/a	-

II. Public POCs for CVE-2021-40839

#	POC Description	Source Link	Shenlong Link
1	Dirty Cow kernel exploit without libcrypt dependency	https://github.com/itlabbet/CVE-2021-40839	POC Details

AI-Generated POCPremium

No public POC found.

III. Intelligence Information for CVE-2021-40839

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https://seclists.org/fulldisclosure/2021/Sep/16x_refsource_MISC
https://security.netapp.com/advisory/ntap-20211008-0001/x_refsource_CONFIRM
https://github.com/aresch/rencode/commit/572ff74586d9b1daab904c6f7f7009ce0143bb75x_refsource_MISC
https://github.com/aresch/rencode/pull/29x_refsource_MISC
https://pypi.org/project/rencode/#historyx_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMVQRPDVSVZNGGX57CFKCYT3DEYO4QB6/vendor-advisoryx_refsource_FEDORA
https://nvd.nist.gov/vuln/detail/CVE-2021-40839

IV. Related Vulnerabilities

Same product: n/a

Same vendor: n/a

V. Comments for CVE-2021-40839

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I. Basic Information for CVE-2021-40839

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2021-40839

III. Intelligence Information for CVE-2021-40839

IV. Related Vulnerabilities

V. Comments for CVE-2021-40839

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