CVE-2020-23921 : An issue was discovered in fast_ber through v0.4. yy::yylex() in asn

An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.

Published 2021-04-21 18:15:08

Updated 2022-10-26 13:49:04

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2020-23921

Fast Ber Project » Fast Ber
Versions up to, including, (<=) 0.4
cpe:2.3:a:fast_ber_project:fast_ber:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.08%

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

~ 36 %

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

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:N/A:P	8.6	4.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: Partial
7.1	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H	1.8	5.2	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: None Availability: High

CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

https://cwe.mitre.org/data/definitions/126.html

CWE - CWE-126: Buffer Over-read (4.8)
Technical Description

CVEs referencing this url
https://github.com/Samuel-Tyler/fast_ber/issues/30

A heap-buffer-overflow in asn_compiler.hpp:11676 · Issue #30 · Samuel-Tyler/fast_ber · GitHub
Exploit;Third Party Advisory

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