CVE-2021-3999
glibc: Off-by-one buffer overflow/underflow in getcwd()
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Se ha encontrado un fallo en glibc. Un desbordamiento y subdesbordamiento de búfer en la función getcwd() puede conllevar a una corrupción de memoria cuando el tamaño del búfer es exactamente 1. Un atacante local que pueda controlar el búfer de entrada y el tamaño pasado a getcwd() en un programa setuid podría usar este fallo para ejecutar potencialmente código arbitrario y escalar sus privilegios en el sistema.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-11-22 CVE Reserved
- 2022-03-02 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-193: Off-by-one Error
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html | Mailing List |
|
| https://security-tracker.debian.org/tracker/CVE-2021-3999 | Third Party Advisory | |
| https://security.netapp.com/advisory/ntap-20221104-0001 | Third Party Advisory |
|
| https://sourceware.org/bugzilla/show_bug.cgi?id=28769 | Issue Tracking | |
| https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e |
| URL | Date | SRC |
|---|---|---|
| https://www.openwall.com/lists/oss-security/2022/01/24/4 | 2024-08-03 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-3999 | 2022-03-15 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2024637 | 2022-03-15 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Netapp Search vendor "Netapp" | H300s Firmware Search vendor "Netapp" for product "H300s Firmware" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | H300s Search vendor "Netapp" for product "H300s" | - | - |
Safe
|
| Netapp Search vendor "Netapp" | H500s Firmware Search vendor "Netapp" for product "H500s Firmware" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | H500s Search vendor "Netapp" for product "H500s" | - | - |
Safe
|
| Netapp Search vendor "Netapp" | H700s Firmware Search vendor "Netapp" for product "H700s Firmware" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | H700s Search vendor "Netapp" for product "H700s" | - | - |
Safe
|
| Netapp Search vendor "Netapp" | H410s Firmware Search vendor "Netapp" for product "H410s Firmware" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | H410s Search vendor "Netapp" for product "H410s" | - | - |
Safe
|
| Netapp Search vendor "Netapp" | H410c Firmware Search vendor "Netapp" for product "H410c Firmware" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | H410c Search vendor "Netapp" for product "H410c" | - | - |
Safe
|
| Gnu Search vendor "Gnu" | Glibc Search vendor "Gnu" for product "Glibc" | < 2.31 Search vendor "Gnu" for product "Glibc" and version " < 2.31" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | E-series Performance Analyzer Search vendor "Netapp" for product "E-series Performance Analyzer" | - | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Nfs Plug-in Search vendor "Netapp" for product "Nfs Plug-in" | * | vmware_vaai |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility" | - | - |
Affected
| ||||||