CVE-2021-28701
CVE-2021-28701
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Another race in XENMAPSPACE_grant_table handling Guests are permitted access to certain Xen-owned pages of memory. The majority of such pages remain allocated / associated with a guest for its entire lifetime. Grant table v2 status pages, however, are de-allocated when a guest switches (back) from v2 to v1. Freeing such pages requires that the hypervisor enforce that no parallel request can result in the addition of a mapping of such a page to a guest. That enforcement was missing, allowing guests to retain access to pages that were freed and perhaps re-used for other purposes. Unfortunately, when XSA-379 was being prepared, this similar issue was not noticed.
CVSS 7.8 · Alta · EPSS 0,3% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
xen
- Versiones
- ≥ unspecified, < 4.12: Desconocido (custom)
- ≥ 4.15.x, < unspecified: Afectada (custom)
- ≥ next of xen-unstable, < unspecified: No afectada (custom)
Sin corrección publicada
xen
- Versiones
- 4.11.x: Afectada
Sin corrección publicada
xen
- Versiones
- ≥ unspecified, < 4.12: Desconocido (custom)
- ≥ 4.12.x, < unspecified: Afectada (custom)
- ≥ next of 4.14.x, < unspecified: No afectada (custom)
Sin corrección publicada
xen Debian:12
- Intervalos de versiones afectados
- ECOSYSTEM: < 4.14.3-1
Actualiza a 4.14.3-1
xen Debian:13
- Intervalos de versiones afectados
- ECOSYSTEM: < 4.14.3-1
Actualiza a 4.14.3-1
xen Debian:14
- Intervalos de versiones afectados
- ECOSYSTEM: < 4.14.3-1
Actualiza a 4.14.3-1
xen Ubuntu:16.04:LTS
- Versiones
- 4.5.1-0ubuntu1
- 4.5.1-0ubuntu2
- 4.6.0-1ubuntu1
- 4.6.0-1ubuntu2
- 4.6.0-1ubuntu4
- 4.6.0-1ubuntu4.1
- 4.6.0-1ubuntu4.2
- 4.6.0-1ubuntu4.3
- 4.6.5-0ubuntu1
- 4.6.5-0ubuntu1.1
- 4.6.5-0ubuntu1.2
- 4.6.5-0ubuntu1.4
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:18.04:LTS
- Versiones
- 4.9.0-0ubuntu3
- 4.9.0-0ubuntu4
- 4.9.2-0ubuntu1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:20.04:LTS
- Versiones
- 4.9.2-0ubuntu2
- 4.9.2-0ubuntu6
- 4.9.2-0ubuntu7
- 4.11.3+24-g14b62ab3e5-1ubuntu1
- 4.11.3+24-g14b62ab3e5-1ubuntu2
- 4.11.3+24-g14b62ab3e5-1ubuntu2.2
- 4.11.3+24-g14b62ab3e5-1ubuntu2.3
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:22.04:LTS
- Versiones
- 4.11.4+24-gddaaccbbab-1ubuntu2
- 4.16.0-1~ubuntu2
- 4.16.0-1~ubuntu2.1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:24.04:LTS
- Versiones
- 4.17.2-1
- 4.17.2+55-g0b56bed864-1
- 4.17.2+76-ge1f9cb16e2-1
- 4.17.2+76-ge1f9cb16e2-1ubuntu1
- 4.17.3+10-g091466ba55-1
- 4.17.3+10-g091466ba55-1.1ubuntu2
- 4.17.3+10-g091466ba55-1.1ubuntu3
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:25.10
- Versiones
- 4.20.0-1ubuntu1
- 4.20.0+68-g35cb38b222-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:26.10
- Versiones
- 4.20.2+7-g1badcf5035-2build2
- 4.20.2+37-g61ff35323e-1ubuntu1
- 4.20.3+127-gc42374a105-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
xen Ubuntu:26.04:LTS
- Versiones
- 4.20.0+68-g35cb38b222-1
- 4.20.2+7-g1badcf5035-2
- 4.20.2+7-g1badcf5035-2build2
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
Fuentes originales
- https://xenbits.xenproject.org/xsa/advisory-384.txt
- http://xenbits.xen.org/xsa/advisory-384.html
- http://www.openwall.com/lists/oss-security/2021/09/08/2
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L4MI3MQAPGILCLXBGQWPZHGE3ALSO4ZU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEHZLIR5DFYYQBH55AERWHLO54OFU42C/
- https://www.debian.org/security/2021/dsa-4977
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HEHUIUWSSMCQGQY3GWX4J2SZGYP5W2Z/
- https://security.gentoo.org/glsa/202208-23
- https://nvd.nist.gov/vuln/detail/CVE-2021-28701