Out-of-bounds Write Affecting iscsiuio package, versions <0.7.8.2-13.42.1


Severity

Recommended
high

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-SLES150-ISCSIUIO-2682867
  • published14 Apr 2022
  • disclosed13 Apr 2021

Introduced: 13 Apr 2021

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

How to fix?

Upgrade SLES:15.0 iscsiuio to version 0.7.8.2-13.42.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream iscsiuio package and not the iscsiuio package as distributed by SLES. See How to fix? for SLES:15.0 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 Base Scores

version 3.1