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Vulnerability Details :

CVE-2023-23931

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-07 Feb, 2023 | 20:54
Updated At-03 Nov, 2025 | 21:47
Rejected At-
Credits

Cipher.update_into can corrupt memory in pyca cryptography

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:07 Feb, 2023 | 20:54
Updated At:03 Nov, 2025 | 21:47
Rejected At:
▼CVE Numbering Authority (CNA)
Cipher.update_into can corrupt memory in pyca cryptography

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.

Affected Products
Vendor
pyca
Product
cryptography
Versions
Affected
  • >=1.8, < 39.0.1
Problem Types
TypeCWE IDDescription
CWECWE-754CWE-754: Improper Check for Unusual or Exceptional Conditions
Type: CWE
CWE ID: CWE-754
Description: CWE-754: Improper Check for Unusual or Exceptional Conditions
Metrics
VersionBase scoreBase severityVector
3.14.8MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Version: 3.1
Base score: 4.8
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
x_refsource_CONFIRM
https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
x_refsource_MISC
Hyperlink: https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
1. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://security.netapp.com/advisory/ntap-20230324-0007/
N/A
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
x_refsource_CONFIRM
x_transferred
https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
x_refsource_MISC
x_transferred
https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
N/A
Hyperlink: https://security.netapp.com/advisory/ntap-20230324-0007/
Resource: N/A
Hyperlink: https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
Resource: N/A
2. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:07 Feb, 2023 | 21:15
Updated At:03 Nov, 2025 | 22:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.8MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Primary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Type: Secondary
Version: 3.1
Base score: 4.8
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Type: Primary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CPE Matches
cryptography.io
cryptography.io
>>cryptography>>Versions from 1.8(inclusive) to 39.0.1(exclusive)
cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*
Weaknesses
CWE IDTypeSource
CWE-754Secondarysecurity-advisories@github.com
CWE ID: CWE-754
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3security-advisories@github.com
Patch
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6rsecurity-advisories@github.com
Exploit
Vendor Advisory
https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3af854a3a-2127-422b-91ae-364da2661108
Patch
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6raf854a3a-2127-422b-91ae-364da2661108
Exploit
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/10/msg00012.htmlaf854a3a-2127-422b-91ae-364da2661108
N/A
https://security.netapp.com/advisory/ntap-20230324-0007/af854a3a-2127-422b-91ae-364da2661108
N/A
Hyperlink: https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/pyca/cryptography/pull/8230/commits/94a50a9731f35405f0357fa5f3b177d46a726ab3
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Patch
Hyperlink: https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Exploit
Vendor Advisory
Hyperlink: https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://security.netapp.com/advisory/ntap-20230324-0007/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A

Change History

0
Information is not available yet

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