HOME VULNERABILITIESCVE-2017-7493

HIGH

CVE-2017-7493

CWE-732Published: May 17, 2017· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.

Technical Analysis

CVE-2017-7493 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)

debian linux

qemu1 product(s)

qemu

Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://seclists.org/oss-sec/2017/q2/278

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1451709

PATCHhttps://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.html

PATCHhttp://seclists.org/oss-sec/2017/q2/278

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1451709

PATCHhttps://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.html

ADVISORYhttp://www.securityfocus.com/bid/98574

ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

ADVISORYhttps://security.gentoo.org/glsa/201706-03

ADVISORYhttp://www.securityfocus.com/bid/98574

ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

ADVISORYhttps://security.gentoo.org/glsa/201706-03

All References (12)

→

http://seclists.org/oss-sec/2017/q2/278Mailing List · Patch · Third Party Advisory

→

http://www.securityfocus.com/bid/98574Third Party Advisory · VDB Entry

→

https://bugzilla.redhat.com/show_bug.cgi?id=1451709Issue Tracking · Patch · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List · Third Party Advisory

→

https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.htmlMailing List · Patch · Third Party Advisory

→

https://security.gentoo.org/glsa/201706-03Third Party Advisory

→

http://seclists.org/oss-sec/2017/q2/278Mailing List · Patch · Third Party Advisory

→

http://www.securityfocus.com/bid/98574Third Party Advisory · VDB Entry

→

https://bugzilla.redhat.com/show_bug.cgi?id=1451709Issue Tracking · Patch · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List · Third Party Advisory

→

https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.htmlMailing List · Patch · Third Party Advisory

→

https://security.gentoo.org/glsa/201706-03Third Party Advisory

Quick Facts

CVE IDCVE-2017-7493

CVSS Score7.8 / 10

SeverityHIGH

WeaknessCWE-732

CISA KEVNo

Affected2 vendor(s)

PublishedMay 17, 2017

Related CVEs (CWE-732)

CVE-2014-125121

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2017-7493 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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