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CVE-2020-17437

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-6259-1
Posted Jul 27, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6259-1 - Jos Wetzels, Stanislav Dashevskyi, and Amine Amri discovered that Open-iSCSI incorrectly handled certain checksums for IP packets. An attacker could possibly use this issue to expose sensitive information. Jos Wetzels, Stanislav Dashevskyi, Amine Amri discovered that Open-iSCSI incorrectly handled certain parsing TCP MSS options. An attacker could possibly use this issue to cause a crash or cause unexpected behavior.

tags | advisory, tcp
systems | linux, ubuntu
advisories | CVE-2020-13987, CVE-2020-13988, CVE-2020-17437
SHA-256 | 11add8b04ad913d8a0d55bdb51820f2c3df6cc99cc46d3fb35aa47446b9c769f
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