GNU Bison 3.7 NULL Byte use after free

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in GNU Bison 3.7. This vulnerability affects unknown code. Executing a manipulation as part of NULL Byte can lead to use after free. This vulnerability is registered as CVE-2020-24240. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability has been found in GNU Bison 3.7 and classified as problematic. This vulnerability affects an unknown part. The manipulation as part of a NULL Byte leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. CVE summarizes:

GNU Bison 3.7 has a use after free (UAF) vulnerability. A local attacker may execute bison with crafted input file containing a NULL byte, which could triggers UAF and thus cause system crash.

The weakness was published 08/25/2020. This vulnerability was named CVE-2020-24240 since 08/13/2020. The attack needs to be approached locally. A single authentication is necessary for exploitation. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/13/2020 🔍
08/25/2020 +12 days 🔍
08/25/2020 +0 days 🔍
08/25/2020 +0 days 🔍

Sourcesinfo

Vendor: gnu.org

Status: Not defined

CVE: CVE-2020-24240 (🔍)
GCVE (CVE): GCVE-0-2020-24240
GCVE (VulDB): GCVE-100-160240

Entryinfo

Created: 08/25/2020 19:46
Updated: 08/25/2020 19:51
Changes: 08/25/2020 19:46 (35), 08/25/2020 19:51 (17)
Complete: 🔍
Cache ID: 216::103

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