libyang up to 1.0-r2 yyparse double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in libyang up to 1.0-r2. This vulnerability affects the function yyparse. This manipulation causes double free. This vulnerability is handled as CVE-2019-20394. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in libyang up to 1.0-r2 and classified as critical. Affected by this vulnerability is the function yyparse. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type statement in used in a notification statement. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.

The weakness was released 01/22/2020. This vulnerability is known as CVE-2019-20394 since 01/22/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.0-r3 eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-149255, VDB-149254, VDB-149253 and VDB-149252. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libyang 1.0-r3
Patch: github.com

Timelineinfo

01/22/2020 🔍
01/22/2020 +0 days 🔍
01/23/2020 +1 days 🔍
03/25/2024 +1523 days 🔍

Sourcesinfo

Advisory: 6cc51b1757dfbb7cff92de074ada65e8523289a6
Status: Not defined

CVE: CVE-2019-20394 (🔍)
GCVE (CVE): GCVE-0-2019-20394
GCVE (VulDB): GCVE-100-149251
See also: 🔍

Entryinfo

Created: 01/23/2020 08:36
Updated: 03/25/2024 11:32
Changes: 01/23/2020 08:36 (38), 01/23/2020 08:41 (17), 03/25/2024 11:25 (20), 03/25/2024 11:32 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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