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Fencer Intel
high 7.8

CVE-2017-17840 json

An issue was discovered in Open-iSCSI through 2.0.875.

published 2017-12-22 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-8987

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

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.

Patch / fix

  • open-iscsi Debian 14, Debian 13, Debian 12 2.0.874-5

debian advisories DEBIAN-CVE-2017-17840

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-17840 updated cvss 6.5

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

  • Red Hat Enterprise Linux 5 iscsi-initiator-utils Red Hat Enterprise Linux 6 iscsi-initiator-utils Red Hat Enterprise Linux 7 iscsi-initiator-utils, iscsi-initiator-utils-iscsiuio Red Hat Enterprise Linux 8 iscsi-initiator-utils, python3-iscsi-initiator-utils, iscsi-initiator-utils-iscsiuio
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 iscsi-initiator-utils, python3-iscsi-initiator-utils, iscsi-initiator-utils-iscsiuio
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.