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I. Basic Information for CVE-2023-25136
Vulnerability Information

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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."
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
OpenSSH 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenSSH(OpenBSD Secure Shell)是加拿大OpenBSD计划组的一套用于安全访问远程计算机的连接工具。该工具是SSH协议的开源实现,支持对所有的传输进行加密,可有效阻止窃听、连接劫持以及其他网络级的攻击。 OpenSSH 存在资源管理错误漏洞,该漏洞源于options.kex_algorithms 处理期间引入了双重释放漏洞。
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
VendorProductAffected VersionsCPESubscribe
-n/a n/a -
II. Public POCs for CVE-2023-25136
#POC DescriptionSource LinkShenlong Link
1Nonehttps://github.com/jfrog/jfrog-CVE-2023-25136-OpenSSH_Double-FreePOC Details
2Nonehttps://github.com/ticofookfook/CVE-2023-25136POC Details
3OpenSSH 9.1 vulnerability mass scan and exploithttps://github.com/Christbowel/CVE-2023-25136POC Details
4OpenSSH Pre-Auth Double Free CVE-2023-25136 POChttps://github.com/adhikara13/CVE-2023-25136POC Details
5OpenSSH 9.1 vulnerability mass scan and exploithttps://github.com/nhakobyan685/CVE-2023-25136POC Details
6CVE-2023-25136 POC written by axylisdeadhttps://github.com/axylisdead/CVE-2023-25136_POCPOC Details
7OpenSSH 9.1漏洞大规模扫描和利用https://github.com/H4K6/CVE-2023-25136POC Details
8Looking into the memory when sshd 9.1p1 aborts due to a double free bug.https://github.com/Business1sg00d/CVE-2023-25136POC Details
9OpenSSH Pre-Auth Double Free CVE-2023-25136 – Writeup and Proof-of-Concepthttps://github.com/malvika-thakur/CVE-2023-25136POC Details
10This vulnerability is of the "double-free" type, which occurs during the processing of key exchange (KEX) algorithms in OpenSSH. A "double-free" vulnerability happens when memory that has already been freed is freed again. This issue can indirectly lead to remote code execution (RCE) by an attacker.https://github.com/mrmtwoj/CVE-2023-25136POC Details
11Nonehttps://github.com/Lane0218/CVE-2023-25136-PoCPOC Details
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III. Intelligence Information for CVE-2023-25136
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