SerenityOS ASN.1 DER.h der_decode_sequence buffer overflow

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

Summaryinfo

A vulnerability labeled as critical has been found in SerenityOS. Impacted is the function Crypto::der_decode_sequence in the library /Userland/Libraries/LibCrypto/ASN1/DER.h of the component ASN.1 Handler. The manipulation results in buffer overflow. This vulnerability was named CVE-2021-27343. The attack needs to be approached within the local network. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in SerenityOS (the affected version unknown). It has been classified as problematic. Affected is the function Crypto::der_decode_sequence in the library /Userland/Libraries/LibCrypto/ASN1/DER.h of the component ASN.1 Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality.

The weakness was presented 04/07/2021. The advisory is available at github.com. This vulnerability is traded as CVE-2021-27343. Technical details are known, but there is no available exploit.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 7.5
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: Buffer overflow
CWE: CWE-120 / 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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

02/16/2021 🔍
04/07/2021 +49 days 🔍
04/07/2021 +0 days 🔍
04/11/2021 +4 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2021-27343 (🔍)
GCVE (CVE): GCVE-0-2021-27343
GCVE (VulDB): GCVE-100-172518

Entryinfo

Created: 04/07/2021 07:42
Updated: 04/11/2021 07:03
Changes: 04/07/2021 07:42 (38), 04/11/2021 06:59 (5), 04/11/2021 07:03 (18)
Complete: 🔍
Cache ID: 216::103

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