CVE-2020-17437

NameCVE-2020-17437
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
open-iscsi (PTS)stretch2.0.874-3~deb9u1vulnerable
buster2.0.874-7.1vulnerable
bullseye2.1.3-5fixed
bookworm, sid2.1.4-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
open-iscsisource(unstable)2.1.3-1

Notes

[buster] - open-iscsi <no-dsa> (Minor issue)
[stretch] - open-iscsi <no-dsa> (Minor issue)
https://groups.google.com/g/open-iscsi/c/iRS9fcB1bJU/m/BbxY1SGPEwAJ
Adressed upstream in 2.1.3 release

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