libyang up to 1.0-r2 lys_extension_instances_free null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in libyang up to 1.0-r2. The impacted element is the function lys_extension_instances_free. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2019-20398. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in libyang up to 1.0-r2. It has been rated as problematic. This issue affects the function lys_extension_instances_free. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.

The weakness was published 01/22/2020. The identification of this vulnerability is CVE-2019-20398 since 01/22/2020. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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.

Similar entries are available at VDB-149254, VDB-149253, VDB-149252 and VDB-149251. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 7852b272ef77f8098c35deea6c6f09cb78176f08
Status: Not defined

CVE: CVE-2019-20398 (🔍)
GCVE (CVE): GCVE-0-2019-20398
GCVE (VulDB): GCVE-100-149255
See also: 🔍

Entryinfo

Created: 01/23/2020 08:42
Updated: 03/25/2024 12:32
Changes: 01/23/2020 08:42 (37), 01/23/2020 08:47 (17), 03/25/2024 12:24 (20), 03/25/2024 12:32 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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