CVE-2020-27749
CVE-2020-27749
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS 7.5 · Alta · EPSS 0,6% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
grub2
- Versiones
- grub 2.06: Afectada
Sin corrección publicada
grub2 Debian:12
- Intervalos de versiones afectados
- ECOSYSTEM: < 2.04-16
Actualiza a 2.04-16
grub2 Debian:13
- Intervalos de versiones afectados
- ECOSYSTEM: < 2.04-16
Actualiza a 2.04-16
grub2 Debian:14
- Intervalos de versiones afectados
- ECOSYSTEM: < 2.04-16
Actualiza a 2.04-16
grub2-signed Ubuntu:Pro:14.04:LTS
- Versiones
- 1.22
- 1.23
- 1.24
- 1.25
- 1.26
- 1.27
- 1.30
- 1.31
- 1.32
- 1.33
- 1.34
- 1.34.1
- 1.34.2
- 1.34.3
- 1.34.4
- 1.34.5
- 1.34.6
- 1.34.7
- 1.34.8
- 1.34.9
- 1.34.13
- 1.34.14
- 1.34.16
- 1.34.17
- 1.34.18
- 1.34.20
- 1.34.22
- 1.34.24
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
grub2-signed Ubuntu:18.04:LTS
- Versiones
- 1.85
- 1.86
- 1.87
- 1.89
- 1.91
- 1.92
- 1.93
- 1.93.1
- 1.93.2
- 1.93.3
- 1.93.4
- 1.93.5
- 1.93.7
- 1.93.8
- 1.93.10
- 1.93.11
- 1.93.13
- 1.93.14
- 1.93.15
- 1.93.16
- 1.93.18
- 1.93.19
- 1.93.20
- 1.93.21
- 1.93.22
- 1.93.24
- 1.167~18.04.1
- 1.167~18.04.3
- Intervalos de versiones afectados
- ECOSYSTEM: < 1.167~18.04.5
Actualiza a 1.167~18.04.5
grub2-unsigned Ubuntu:18.04:LTS
- Versiones
- 2.04-1ubuntu44
- 2.04-1ubuntu44.1
- Intervalos de versiones afectados
- ECOSYSTEM: < 2.04-1ubuntu44.1.2
Actualiza a 2.04-1ubuntu44.1.2
grub2-signed Ubuntu:20.04:LTS
- Versiones
- 1.128
- 1.129
- 1.130
- 1.131
- 1.133
- 1.134
- 1.135
- 1.136
- 1.137
- 1.138
- 1.139
- 1.140
- 1.141
- 1.142
- 1.142.1
- 1.142.3
- 1.142.4
- 1.142.5
- 1.142.6
- 1.142.8
- 1.142.9
- 1.142.10
- 1.142.11
- 1.167
- Intervalos de versiones afectados
- ECOSYSTEM: < 1.167.2
Actualiza a 1.167.2
grub2-unsigned Ubuntu:20.04:LTS
- Versiones
- 2.04-1ubuntu44
- Intervalos de versiones afectados
- ECOSYSTEM: < 2.04-1ubuntu44.2
Actualiza a 2.04-1ubuntu44.2
Fuentes originales
- https://bugzilla.redhat.com/show_bug.cgi?id=1899966
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
- https://security.gentoo.org/glsa/202104-05
- https://security.netapp.com/advisory/ntap-20220325-0001/
- https://nvd.nist.gov/vuln/detail/CVE-2020-27749