libdwarf up to 20201017 Line-Table Header dwarf_print_lines.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in libdwarf. Affected by this issue is some unknown functionality of the file dwarf_print_lines.c of the component Line-Table Header Handler. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2020-28163. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in libdwarf (Programming Tool Software) and classified as problematic. This issue affects an unknown code of the file dwarf_print_lines.c of the component Line-Table Header Handler. 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:

libdwarf before 20201201 allows a dwarf_print_lines.c NULL pointer dereference and application crash via a DWARF5 line-table header that has an invalid FORM for a pathname.

The weakness was shared 04/16/2023 as faf99408e3f9f706fc3809dd400e831f989778d3. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2020-28163 since 11/02/2020. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 20201201 eliminates this vulnerability. Applying the patch faf99408e3f9f706fc3809dd400e831f989778d3 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

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

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

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: libdwarf 20201201
Patch: faf99408e3f9f706fc3809dd400e831f989778d3

Timelineinfo

11/02/2020 🔍
12/01/2020 +29 days 🔍
04/16/2023 +865 days 🔍
04/16/2023 +0 days 🔍
02/06/2025 +662 days 🔍

Sourcesinfo

Advisory: faf99408e3f9f706fc3809dd400e831f989778d3
Status: Confirmed

CVE: CVE-2020-28163 (🔍)
GCVE (CVE): GCVE-0-2020-28163
GCVE (VulDB): GCVE-100-226139

Entryinfo

Created: 04/16/2023 08:00
Updated: 02/06/2025 18:53
Changes: 04/16/2023 08:00 (44), 02/06/2025 18:53 (27)
Complete: 🔍
Cache ID: 216::103

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