Out-of-bounds Write Affecting open-iscsi package, versions *


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-UBUNTU2010-OPENISCSI-1056181
  • published6 Jan 2021
  • disclosed11 Dec 2020

Introduced: 11 Dec 2020

CVE-2020-17437  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:20.10 open-iscsi.

NVD Description

Note: Versions mentioned in the description apply only to the upstream open-iscsi package and not the open-iscsi package as distributed by Ubuntu. See How to fix? for Ubuntu:20.10 relevant fixed versions and status.

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.

CVSS Scores

version 3.1