Use After Free Vulnerability in BYACC by OpenEuler
CVE-2021-33641

7.8HIGH

Key Information:

Vendor

Openeuler

Status
Byacc
Vendor
CVE Published:
20 January 2023

What is CVE-2021-33641?

A use after free vulnerability exists in BYACC, a parser generator by OpenEuler. This flaw arises when the system incorrectly accesses previously released memory while processing comments. An attacker could exploit this vulnerability to manipulate memory, leading to potential application instability or compromise of sensitive data.

Affected Version(s)

byacc <1.9.20200330 and <2.0.20210808

References

https://gitee.com/src-openeuler/byacc/commit/50225f48c6b5...

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.