IM
IronMonkey Threat Research

CVE-2021-27645 LOW

Published: 2021-02-24 | Last Modified: 2025-06-09 | Status: Modified

Description

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

Additional Descriptions (1)

El demonio de almacenamiento en caché nameserver (nscd) en el GNU C Library (también se conoce como glibc o libc6) versiones 2.29 hasta 2.33, cuando se procesa una petición de búsqueda de netgroup, puede cometer un fallo debido a una doble liberación, potencialmente resultando en un servicio degradado o denegación de servicio en el sistema local. Esto está relacionado con el archivo netgroupcache.c

CVSS Metrics

Base Score: 2.5 (LOW)

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

Attack VectorLOCAL
Attack ComplexityHIGH
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactLOW

Source: [email protected]

Type: Primary

Exploitability Score: 1.0

Impact Score: 1.4

Base Score: 1.9 (LOW)

AV:L/AC:M/Au:N/C:N/I:N/A:P

Access VectorLOCAL
Access ComplexityMEDIUM
AuthenticationNONE
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactPARTIAL

Source: [email protected]

Type: Primary

Exploitability Score: 3.4

Impact Score: 2.9

Weaknesses

Source Type Description
[email protected] Primary
en CWE-415
134c704f-9b21-4f2e-91b3-4a467353bcc0 Secondary
en CWE-415

Affected Products

Vendor Product Version Update Type
gnu glibc * <built-in method update of dict object at 0x7fd36adbd2c0> Application
fedoraproject fedora 33 <built-in method update of dict object at 0x7fd386757f40> Operating System
fedoraproject fedora 34 <built-in method update of dict object at 0x7fd36a063380> Operating System
debian debian_linux 10.0 <built-in method update of dict object at 0x7fd36b231240> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Yes cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References