CVE-2021-3998

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Summary

CVECVE-2021-3998
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-08-24 16:15:09 UTC
Updated2026-10-14 10:17:49 UTC
DescriptionA flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-125 | CWE-252 | CWE-125 CWE-125 - Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnu Glibc All All All All
Hardware Netapp H300s - All All All
Operating System Netapp H300s Firmware - All All All
Hardware Netapp H410c - All All All
Operating System Netapp H410c Firmware - All All All
Hardware Netapp H410s - All All All
Operating System Netapp H410s Firmware - All All All
Hardware Netapp H500s - All All All
Operating System Netapp H500s Firmware - All All All
Hardware Netapp H700s - All All All
Operating System Netapp H700s Firmware - All All All
Application Netapp Ontap Select Deploy Administration Utility - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Glibc affected Affects glibc v2.33 and above. Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
CVE-2021-3998 GNU C Library (glibc) Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
2024633 – (CVE-2021-3998) CVE-2021-3998 glibc: Unexpected return value from realpath() could leak data based on the application af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
28770 – (CVE-2021-3998) Unexpected return value from realpath() for too long results (CVE-2021-3998) af854a3a-2127-422b-91ae-364da2661108 sourceware.org Issue Tracking, Patch, Third Party Advisory
Red Hat Customer Portal - Access to 24x7 support and knowledge af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-831302.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
sourceware.org Git - glibc.git/commit af854a3a-2127-422b-91ae-364da2661108 sourceware.org
sourceware.org Git af854a3a-2127-422b-91ae-364da2661108 sourceware.org
oss-security - CVE-2021-3998 and CVE-2021-3999 in glibc's realpath() and getcwd() af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch, Third Party Advisory
CVE-2021-3998 af854a3a-2127-422b-91ae-364da2661108 security-tracker.debian.org Third Party Advisory
sourceware.org Git - glibc.git/commit MITRE sourceware.org
sourceware.org Git - glibc.git/commit MITRE sourceware.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 182900 Debian Security Update for glibc (CVE-2021-3998)
  • 198685 Ubuntu Security Notification for GNU C Library Vulnerabilities (USN-5310-1)
  • 282318 Fedora Security Update for glibc (FEDORA-2022-918e18c52c)
  • 376419 Snap-Confine Local Privilege Escalation Vulnerability (Oh Snap! More Lemmings)
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 710605 Gentoo Linux GNU C Library Multiple Vulnerabilities (GLSA 202208-24)

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