Podatność CVE-2018-1087


Publikacja: 2018-05-15

Opis:
kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.

Typ:

CWE-noinfo

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:P/A:P)

Ogólna skala CVSS
Znaczenie
Łatwość wykorzystania
4.6/10
6.4/10
3.9/10
Wymagany dostęp
Złożoność ataku
Autoryzacja
Lokalny
Niska
Nie wymagana
Wpływ na poufność
Wpływ na integralność
Wpływ na dostępność
Częściowy
Częściowy
Częściowy
Affected software
Redhat -> Enterprise linux 
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux server aus 
Redhat -> Enterprise linux server eus 
Redhat -> Enterprise linux server tus 
Redhat -> Enterprise linux virtualization 
Redhat -> Enterprise linux workstation 
Linux -> Linux kernel 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 Referencje:
http://www.openwall.com/lists/oss-security/2018/05/08/5
http://www.securityfocus.com/bid/104127
http://www.securitytracker.com/id/1040862
https://access.redhat.com/errata/RHSA-2018:1318
https://access.redhat.com/errata/RHSA-2018:1345
https://access.redhat.com/errata/RHSA-2018:1347
https://access.redhat.com/errata/RHSA-2018:1348
https://access.redhat.com/errata/RHSA-2018:1355
https://access.redhat.com/errata/RHSA-2018:1524
https://access.redhat.com/security/vulnerabilities/pop_ss
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1087
https://usn.ubuntu.com/3641-1/
https://usn.ubuntu.com/3641-2/
https://www.debian.org/security/2018/dsa-4196

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