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Vulnerability record · CVE-2017-17840 · published 27 December 2017

CVE-2017-17840: Open-iscsi project open-iscsi memory buffer overflow vulnerability

Open Iscsi Project · Open Iscsi

An issue was discovered in Open-iSCSI through 2.0.875. A local attacker can cause the iscsiuio server to abort or potentially execute code by sending messages with incorrect lengths, which (due to lack of checking) can lead to buffer overflows, and result in aborts (with overflow checking enabled) or code execution. The process_iscsid_broadcast function in iscsiuio/src/unix/iscsid_ipc.c does not validate the payload length before a write operation.

7.8 CVSS 3.0 High EPSS 0.45% · top 63.8% CWE-119 · Memory buffer overflow
7.8CVSS 3.0 base score, v2 4.6
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Open-iSCSI through 2.0.875. A local attacker can cause the iscsiuio server to abort or potentially execute code by sending messages with incorrect lengths, which (due to lack of checking) can lead to buffer overflows, and result in aborts (with overflow checking enabled) or code execution. The process_iscsid_broadcast function in iscsiuio/src/unix/iscsid_ipc.c does not validate the payload length before a write operation.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2017/12/13/2 Mailing ListThird Party Advisory
https://bugzilla.opensuse.org/show_bug.cgi?id=1072312 Issue TrackingThird Party Advisory
http://www.openwall.com/lists/oss-security/2017/12/13/2 Mailing ListThird Party Advisory
https://bugzilla.opensuse.org/show_bug.cgi?id=1072312 Issue TrackingThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-17840), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.