Upstream information

CVE-2020-24240 at MITRE

Description

GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.

SUSE information

Overall state of this security issue: Analysis

This issue is currently rated as having moderate severity.

CVSS v3 Scores
  SUSE
Base Score 5.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1175887 [CONFIRMED]

No SUSE Security Announcements cross referenced.


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE CaaS Platform 4.5 bison Analysis
SUSE Enterprise Storage 7 bison Analysis
SUSE Linux Enterprise Desktop 15 SP1 bison Analysis
SUSE Linux Enterprise Desktop 15 SP2 bison Analysis
SUSE Linux Enterprise Desktop 15 SP3 bison Analysis
SUSE Linux Enterprise Desktop 15 SP4 bison Analysis
SUSE Linux Enterprise High Performance Computing 12 SP4 bison Analysis
SUSE Linux Enterprise High Performance Computing 12 SP5 bison Analysis
SUSE Linux Enterprise High Performance Computing 15 LTSS bison Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 bison Analysis
SUSE Linux Enterprise High Performance Computing 15 SP1 ESPOS bison Analysis
SUSE Linux Enterprise High Performance Computing 15 SP2 bison Analysis
SUSE Linux Enterprise High Performance Computing 15 SP2 ESPOS bison Analysis
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS bison Analysis
SUSE Linux Enterprise High Performance Computing 15 SP3 bison Analysis
SUSE Linux Enterprise High Performance Computing 15 SP4 bison Analysis
SUSE Linux Enterprise Module for Basesystem 15 SP1 bison Analysis
SUSE Linux Enterprise Module for Basesystem 15 SP2 bison Analysis
SUSE Linux Enterprise Module for Basesystem 15 SP3 bison Analysis
SUSE Linux Enterprise Module for Basesystem 15 SP4 bison Analysis
SUSE Linux Enterprise Module for Development Tools 15 SP1 bison Analysis
SUSE Linux Enterprise Module for Development Tools 15 SP2 bison Analysis
SUSE Linux Enterprise Module for Development Tools 15 SP3 bison Analysis
SUSE Linux Enterprise Module for Development Tools 15 SP4 bison Analysis
SUSE Linux Enterprise Real Time 15 SP2 bison Analysis
SUSE Linux Enterprise Server 11 SP1 bison Analysis
SUSE Linux Enterprise Server 11 SP3 bison Analysis
SUSE Linux Enterprise Server 11 SP4 LTSS bison Analysis
SUSE Linux Enterprise Server 12 SP2 BCL bison Analysis
SUSE Linux Enterprise Server 12 SP2 LTSS bison Unsupported
SUSE Linux Enterprise Server 12 SP3 BCL bison Analysis
SUSE Linux Enterprise Server 12 SP3 LTSS bison Analysis
SUSE Linux Enterprise Server 12 SP4 LTSS bison Analysis
SUSE Linux Enterprise Server 12 SP5 bison Analysis
SUSE Linux Enterprise Server 15 ESPOS bison Affected
SUSE Linux Enterprise Server 15 LTSS bison Affected
SUSE Linux Enterprise Server 15 SP1 bison Analysis
SUSE Linux Enterprise Server 15 SP2 bison Analysis
SUSE Linux Enterprise Server 15 SP2 LTSS bison Analysis
SUSE Linux Enterprise Server 15 SP3 bison Analysis
SUSE Linux Enterprise Server 15 SP4 bison Analysis
SUSE Linux Enterprise Server Business Critical Linux 15 SP1 bison Analysis
SUSE Linux Enterprise Server Business Critical Linux 15 SP2 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP2 bison Unsupported
SUSE Linux Enterprise Server for SAP Applications 12 SP3 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP4 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP5 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 15 SP1 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 15 SP2 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 15 SP3 bison Analysis
SUSE Linux Enterprise Server for SAP Applications 15 SP4 bison Analysis
SUSE Linux Enterprise Software Development Kit 12 SP5 bison Analysis
SUSE Linux Enterprise Storage 6 bison Analysis
SUSE Linux Enterprise Storage 7 bison Analysis
SUSE Linux Enterprise Storage 7.1 bison Analysis
SUSE Manager Proxy 4.0 bison Analysis
SUSE Manager Proxy 4.1 bison Analysis
SUSE Manager Proxy 4.2 bison Analysis
SUSE Manager Proxy 4.3 bison Analysis
SUSE Manager Retail Branch Server 4.0 bison Analysis
SUSE Manager Retail Branch Server 4.1 bison Analysis
SUSE Manager Retail Branch Server 4.2 bison Analysis
SUSE Manager Retail Branch Server 4.3 bison Analysis
SUSE Manager Server 4.0 bison Analysis
SUSE Manager Server 4.1 bison Analysis
SUSE Manager Server 4.2 bison Analysis
SUSE Manager Server 4.3 bison Analysis