Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-23931— Cipher.update_into can corrupt memory in pyca cryptography

Quick assessment

Affected
pyca cryptography
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.

python-cryptography是Cryptographic团队的一个应用于加密的 Python 代码库。 cryptography 存在代码问题漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。

CVSS 4.8 · Medium EPSS 1.30% · P71

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-23931

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cipher.update_into can corrupt memory in pyca cryptography
Source: CVE Program / CVE List V5
Vulnerability Description
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
Source: CVE Program / CVE List V5
Vulnerability Title
cryptography 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
python-cryptography是Cryptographic团队的一个应用于加密的 Python 代码库。 cryptography 存在代码问题漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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
pyca cryptography >=1.8, < 39.0.1 -

II. Public POCs for CVE-2023-23931

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-23931

请登录查看更多情报信息。

Patches & Fixes for CVE-2023-23931 (1)

Vendor Advisories for CVE-2023-23931 (1)

IV. Related Vulnerabilities

Same product: cryptography
Same vendor: pyca
Same weakness: CWE-754