GNU glibc canonicalize.c realpath out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in GNU glibc. Affected is the function realpath of the file canonicalize.c. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2021-3998. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability classified as problematic was found in GNU glibc (Software Library) (affected version not known). This vulnerability affects the function realpath of the file canonicalize.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:

A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.

The weakness was presented 08/25/2022. The advisory is available at access.redhat.com. This vulnerability was named CVE-2021-3998 since 11/22/2021. Technical details are known, but there is no available exploit.

Applying the patch 84d2d0fe20bdf94feed82b21b4d7d136db471f03 is able to eliminate this problem. The bugfix is ready for download at sourceware.org.

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Productinfo

Type

Vendor

Name

License

Website

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: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 84d2d0fe20bdf94feed82b21b4d7d136db471f03

Timelineinfo

11/22/2021 🔍
08/25/2022 +275 days 🔍
08/25/2022 +0 days 🔍
06/09/2025 +1019 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2021-3998 (🔍)
GCVE (CVE): GCVE-0-2021-3998
GCVE (VulDB): GCVE-100-207118

Entryinfo

Created: 08/25/2022 08:55
Updated: 06/09/2025 18:01
Changes: 08/25/2022 08:55 (42), 09/25/2022 14:35 (11), 06/09/2025 18:01 (15)
Complete: 🔍
Cache ID: 216::103

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