CVE-2021-31871

View on CVE.org

Published Apr 30, 2021 CVSS 3.1 · 7.5 High EPSS 1.9% KEV · Not listed

Description

An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:klibc_project:klibc:*:*:*:*:*:*:x64:*

Configuration 2 [-]

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
Debian DLA	DLA-2695-1	klibc security update
EUVD	EUVD-2021-18746	An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems.
Ubuntu USN	USN-5379-1	klibc vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 1.9% (1.875% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
http://www.openwall.com/lists/oss-security/2021/04/30/1
https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5
https://kernel.org/pub/linux/libs/klibc/2.0/
https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html
https://lists.zytor.com/archives/klibc/2021-April/004593.html

History

No history.

Subscriptions

Debian Debian Linux

Klibc Project Klibc

Weaknesses

CWE-190

Sources

CVE record Updated: Aug 3, 2024, 11:10 PM

Status: PUBLISHED
Assigner: mitre
Published: Apr 30, 2021, 5:18 AM
Updated: Aug 3, 2024, 11:10 PM
Reserved: Apr 29, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:52 AM

Status: Modified
Published: Apr 30, 2021, 6:15 AM
Modified: Jun 17, 2026, 3:52 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-06-28T20:06:20.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://kernel.org/pub/linux/libs/klibc/2.0/"}, {"tags": ["x_refsource_MISC"], "url": "https://lists.zytor.com/archives/klibc/2021-April/004593.html"}, {"tags": ["x_refsource_MISC"], "url": "https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5"}, {"name": "[oss-security] 20210430 [ANNOUNCE] klibc 2.0.9", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2021/04/30/1"}, {"name": "[debian-lts-announce] 20210628 [SECURITY] [DLA 2695-1] klibc security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-31871", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://kernel.org/pub/linux/libs/klibc/2.0/", "refsource": "MISC", "url": "https://kernel.org/pub/linux/libs/klibc/2.0/"}, {"name": "https://lists.zytor.com/archives/klibc/2021-April/004593.html", "refsource": "MISC", "url": "https://lists.zytor.com/archives/klibc/2021-April/004593.html"}, {"name": "https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5", "refsource": "MISC", "url": "https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5"}, {"name": "[oss-security] 20210430 [ANNOUNCE] klibc 2.0.9", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2021/04/30/1"}, {"name": "[debian-lts-announce] 20210628 [SECURITY] [DLA 2695-1] klibc security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T23:10:30.764Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://kernel.org/pub/linux/libs/klibc/2.0/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://lists.zytor.com/archives/klibc/2021-April/004593.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5"}, {"name": "[oss-security] 20210430 [ANNOUNCE] klibc 2.0.9", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/04/30/1"}, {"name": "[debian-lts-announce] 20210628 [SECURITY] [DLA 2695-1] klibc security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-31871", "datePublished": "2021-04-30T05:18:52.000Z", "dateReserved": "2021-04-29T00:00:00.000Z", "dateUpdated": "2024-08-03T23:10:30.764Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:klibc_project:klibc:*:*:*:*:*:*:x64:*", "matchCriteriaId": "A21954BD-4F83-4E8A-B396-F920FC41AD9E", "versionEndExcluding": "2.0.9", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems."}, {"lang": "es", "value": "Se detect\u00f3 un problema en klibc versiones anteriores a 2.0.9. Un desbordamiento de enteros en el comando cpio puede resultar en una desreferencia del puntero NULL en sistemas de 64 bits."}], "id": "CVE-2021-31871", "lastModified": "2026-06-17T03:52:23.007", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-04-30T06:15:07.287", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Release Notes", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/04/30/1"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://kernel.org/pub/linux/libs/klibc/2.0/"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Release Notes", "Third Party Advisory"], "url": "https://lists.zytor.com/archives/klibc/2021-April/004593.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Release Notes", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/04/30/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://kernel.org/pub/linux/libs/klibc/2.0/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Release Notes", "Third Party Advisory"], "url": "https://lists.zytor.com/archives/klibc/2021-April/004593.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}