libspf2 up to 1.2.10 SPF DNS Record spf_expand.c SPF_record_expand_data heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in libspf2 up to 1.2.10. Impacted is the function SPF_record_expand_data of the file spf_expand.c of the component SPF DNS Record Handler. This manipulation causes heap-based overflow. This vulnerability is handled as CVE-2021-33912. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in libspf2 up to 1.2.10. Affected by this vulnerability is the function SPF_record_expand_data of the file spf_expand.c of the component SPF DNS Record Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 01/20/2022. It is possible to read the advisory at nathanielbennett.com. This vulnerability is known as CVE-2021-33912 since 06/07/2021. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.2.11 eliminates this vulnerability. Applying a patch 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.

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

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / 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: libspf2 1.2.11
Patch: github.com

Timelineinfo

06/07/2021 🔍
01/20/2022 +227 days 🔍
01/20/2022 +0 days 🔍
01/26/2022 +6 days 🔍

Sourcesinfo

Advisory: DLA 2890-1
Status: Confirmed

CVE: CVE-2021-33912 (🔍)
GCVE (CVE): GCVE-0-2021-33912
GCVE (VulDB): GCVE-100-191251

Entryinfo

Created: 01/20/2022 01:05
Updated: 01/26/2022 07:39
Changes: 01/20/2022 01:05 (41), 01/26/2022 07:33 (2), 01/26/2022 07:39 (1)
Complete: 🔍
Cache ID: 216::103

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