HOMEVULNERABILITIESCVE-2017-7539
MEDIUM

CVE-2017-7539

CWE-617Published: July 26, 2018· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official Description

An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.

NVD Source

Technical Analysis

CVE-2017-7539 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Vendors & Products

qemu1 product(s)
qemu
Red Hat3 product(s)
openstackvirtualizationenterprise linux
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2017/07/21/4
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539
PATCHhttp://www.openwall.com/lists/oss-security/2017/07/21/4
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539
ADVISORYhttp://www.securityfocus.com/bid/99944
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:2628
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3466
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3470
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3471
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3472
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3473
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3474
ADVISORYhttp://www.securityfocus.com/bid/99944
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:2628
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3466
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3470
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3471
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3472
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3473
ADVISORYhttps://access.redhat.com/errata/RHSA-2017:3474

All References (24)

→
http://www.openwall.com/lists/oss-security/2017/07/21/4Mailing List · Patch · Third Party Advisory
→
http://www.securityfocus.com/bid/99944Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2017:2628Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3466Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3470Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3471Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3472Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3473Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2017:3474Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539Issue Tracking · Patch · Third Party Advisory
→
https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b
→
https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=ff82911cd3f69f028f2537825c9720ff78bc3f19
→
http://www.openwall.com/lists/oss-security/2017/07/21/4Mailing List · Patch · Third Party Advisory
→
http://www.securityfocus.com/bid/99944Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2017:2628Third Party Advisory

Quick Facts

CVE IDCVE-2017-7539
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-617
CISA KEVNo
Affected2 vendor(s)
PublishedJul 26, 2018

Related CVEs (CWE-617)

CVE-2019-9795
9.8
CVE-2020-3615
9.8
CVE-2020-12417
8.8
CVE-2020-6617
8.8
CVE-2020-6619
8.8
CVE-2020-6623
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-7539 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.
← All Vulnerabilities·Search for CVE-2017-7539·NVD