CVE-2021-27343 : SerenityOS Unspecified is affected by: Buffer Overflow. The impact is: obtain sensitive information (context-dependent).

SerenityOS Unspecified is affected by: Buffer Overflow. The impact is: obtain sensitive information (context-dependent). The component is: /Userland/Libraries/LibCrypto/ASN1/DER.h Crypto::der_decode_sequence() function. The attack vector is: Parsing RSA Key ASN.1.

Published 2021-04-06 13:15:14

Updated 2022-12-08 18:55:42

Source MITRE

View at NVD, CVE.org

Vulnerability category: Overflow

Exploit prediction scoring system (EPSS) score for CVE-2021-27343

EPSS FAQ

0.13%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 48 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-27343

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2021-27343

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-27343

https://github.com/SerenityOS/serenity/commit/48fbf6a88d4822a1e5470cf08f29464511bd72c1

LibCrypto: Don't copy the prime test candidates · SerenityOS/serenity@48fbf6a · GitHub
Patch;Third Party Advisory
https://github.com/SerenityOS/serenity/pull/5344

LibCrypto: Make a better ASN.1 parser by alimpfard · Pull Request #5344 · SerenityOS/serenity · GitHub
Third Party Advisory
https://github.com/SerenityOS/serenity/issues/5317

LibCrypto: Read buffer overflow in Crypto::der_decode_sequence · Issue #5317 · SerenityOS/serenity · GitHub
Third Party Advisory

Products affected by CVE-2021-27343

Serenityos » Serenityos » Version: N/A
cpe:2.3:o:serenityos:serenityos:-:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2021-27343

Exploit prediction scoring system (EPSS) score for CVE-2021-27343

CVSS scores for CVE-2021-27343

CWE ids for CVE-2021-27343

References for CVE-2021-27343

Products affected by CVE-2021-27343