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CVE-2017-17840

22
FAUCET Score

CVE-2017-17840 is a buffer overflow vulnerability affecting Open-iSCSI through version 2.0.875, specifically within the iscsiuio server. A local attacker with low privileges can exploit this by sending malformed messages, leading to a denial of service or potentially arbitrary code execution. With a CVSS score of 7.8 (High), the vulnerability has significant impact on confidentiality, integrity, and availability. There is currently no public exploit code available, nor any evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.0.875CPE matchmatch criteria
cpe:2.3:a:open-iscsi_project:open-iscsi:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 77th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: iscsi-initiator-utils
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: iscsi-initiator-utils
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: iscsi-initiator-utils
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: iscsi-initiator-utils

Vendor Advisories (1)

redhatCVE-2017-17840Moderate

iscsi-initiator-utils: Heap-based buffer overflow in process_iscsid_broadcast()

Dec 22, 2017

References

bugzilla.opensuse.org / show_bug.cgi
Issue TrackingThird Party Advisory
openwall.com / lists/oss-security/2017/12/13/2
Mailing ListThird Party Advisory