ID CVE-2017-5856
Summary Memory leak in the megasas_handle_dcmd function in hw/scsi/megasas.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) via MegaRAID Firmware Interface (MFI) commands with the sglist size set to a value over 2 Gb.
References
Vulnerable Configurations
  • cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
    cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
CVSS
Base: 4.9 (as of 03-10-2019 - 00:03)
Impact:
Exploitability:
CWE CWE-772
CAPEC
  • HTTP DoS
    An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE COMPLETE
cvss-vector via4 AV:L/AC:L/Au:N/C:N/I:N/A:C
refmap via4
bid 95999
confirm
gentoo GLSA-201702-28
mlist
  • [debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security update
  • [oss-security] 20170201 CVE request Qemu: scsi: megasas: host memory leakage in megasas_handle_dcmd
  • [oss-security] 20170202 Re: CVE request Qemu: scsi: megasas: host memory leakage in megasas_handle_dcmd
Last major update 03-10-2019 - 00:03
Published 16-03-2017 - 15:59
Back to Top