Vulnerability-Lookup

FKIE_CVE-2021-3999

Vulnerability from fkie_nvd - Published: 2022-08-24 16:15 - Updated: 2026-10-14 10:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

References

URL	Tags
secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2021-3999	Third Party Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2024637	Issue Tracking, Third Party Advisory
secalert@redhat.com	https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html	Mailing List, Third Party Advisory
secalert@redhat.com	https://security-tracker.debian.org/tracker/CVE-2021-3999	Third Party Advisory
secalert@redhat.com	https://security.netapp.com/advisory/ntap-20221104-0001/	Third Party Advisory
secalert@redhat.com	https://sourceware.org/bugzilla/show_bug.cgi?id=28769	Issue Tracking, Third Party Advisory
secalert@redhat.com	https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
secalert@redhat.com	https://www.openwall.com/lists/oss-security/2022/01/24/4	Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://access.redhat.com/security/cve/CVE-2021-3999	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=2024637	Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security-tracker.debian.org/tracker/CVE-2021-3999	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.netapp.com/advisory/ntap-20221104-0001/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://sourceware.org/bugzilla/show_bug.cgi?id=28769	Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
af854a3a-2127-422b-91ae-364da2661108	https://www.openwall.com/lists/oss-security/2022/01/24/4	Exploit, Mailing List, Third Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-398330.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-831302.html

Impacted products

Vendor	Product	Version
gnu	glibc	*
debian	debian_linux	10.0
debian	debian_linux	11.0
debian	debian_linux	10.0
netapp	e-series_performance_analyzer	-
netapp	nfs_plug-in	*
netapp	ontap_select_deploy_administration_utility	-
netapp	h300s_firmware	-
netapp	h300s	-
netapp	h500s_firmware	-
netapp	h500s	-
netapp	h700s_firmware	-
netapp	h700s	-
netapp	h410s_firmware	-
netapp	h410s	-
netapp	h410c_firmware	-
netapp	h410c	-

JSON

To clipboard

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  "cveTags": [],
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      "lang": "en",
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    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo en glibc. Un desbordamiento y subdesbordamiento de b\u00fafer en la funci\u00f3n getcwd() puede conllevar a una corrupci\u00f3n de memoria cuando el tama\u00f1o del b\u00fafer es exactamente 1. Un atacante local que pueda controlar el b\u00fafer de entrada y el tama\u00f1o pasado a getcwd() en un programa setuid podr\u00eda usar este fallo para ejecutar potencialmente c\u00f3digo arbitrario y escalar sus privilegios en el sistema."
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  ],
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  "lastModified": "2026-10-14T10:17:50.007",
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CVE-2021-3999 (GCVE-0-2021-3999)

Vulnerability from cvelistv5 – Published: 2022-08-24 00:00 – Updated: 2026-10-14 09:59

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-02 20:54 UTC

CWE

CWE-193 - - Off-by-one Error

Assigner

redhat CNA under the redhat root

CNA scorecard B 81/100 over 1014 records in the last 180 days details

References

10 references

URL	Tags
https://www.openwall.com/lists/oss-security/2022/…
https://sourceware.org/bugzilla/show_bug.cgi?id=28769
https://sourceware.org/git/gitweb.cgi?p=glibc.git…
https://bugzilla.redhat.com/show_bug.cgi?id=2024637
https://access.redhat.com/security/cve/CVE-2021-3999
https://security-tracker.debian.org/tracker/CVE-2…
https://lists.debian.org/debian-lts-announce/2022…	mailing-list
https://security.netapp.com/advisory/ntap-2022110…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

4 products

Vendor	Product	Version
n/a	glibc	Affected: Fixed in glibc v2.31 and above.
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)

Show details on NVD website

JSON

To clipboard

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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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