CVE-2012-6036

2012-11-2300:00:00

ubuntu.com

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.001 Low

EPSS

Percentile

34.8%

JSON

The (1) memc_save_get_next_page, (2) tmemc_restore_put_page and (3)
tmemc_restore_flush_page functions in the Transcendent Memory (TMEM) in Xen
4.0, 4.1, and 4.2 do not check for negative id pools, which allows local
guest OS users to cause a denial of service (memory corruption and host
crash) or possibly execute arbitrary code via unspecified vectors. NOTE:
this issue was originally published as part of CVE-2012-3497, which was too
general; CVE-2012-3497 has been SPLIT into this ID and others.

Notes

Author	Note
seth-arnold	Xen team strongly recommends against TMEM use
mdeslaur	only 4.0 and higher ONLY installations where “tmem” is specified on the hypervisor command line are vulnerable. Most Xen installations do not do so. upstream says: “TMEM has been described by its maintainers as a technology preview, and is therefore not supported by them for use in production systems. Pending a full security audit of the code, the Xen.org security team recommends that Xen users do not enable TMEM.” We will not be fixing this in Ubuntu. Marking as “ignored”

Author

Note

seth-arnold

Xen team strongly recommends against TMEM use

mdeslaur

only 4.0 and higher ONLY installations where “tmem” is specified on the hypervisor command line are vulnerable. Most Xen installations do not do so. upstream says: “TMEM has been described by its maintainers as a technology preview, and is therefore not supported by them for use in production systems. Pending a full security audit of the code, the Xen.org security team recommends that Xen users do not enable TMEM.” We will not be fixing this in Ubuntu. Marking as “ignored”