newlib up to 3.x heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in newlib up to 3.x and classified as critical. This impacts the function mEMALIGn/pvALLOc/nano_memalign/nano_valloc/nano_pvalloc. Performing a manipulation results in heap-based overflow. This vulnerability is reported as CVE-2021-3420. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in newlib up to 3.x. It has been classified as critical. This affects the function mEMALIGn/pvALLOc/nano_memalign/nano_valloc/nano_pvalloc. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as 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(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 03/06/2021. The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2021-3420. Technical details are known, but no exploit is available.

Upgrading to version 4.0.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: 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: newlib 4.0.0

Timelineinfo

03/02/2021 🔍
03/06/2021 +4 days 🔍
03/06/2021 +0 days 🔍
03/28/2021 +22 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2021-3420 (🔍)
GCVE (CVE): GCVE-0-2021-3420
GCVE (VulDB): GCVE-100-170817

Entryinfo

Created: 03/06/2021 11:34
Updated: 03/28/2021 21:33
Changes: 03/06/2021 11:34 (37), 03/28/2021 21:31 (5), 03/28/2021 21:33 (18)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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