CVE-2023-37459
For this reason, an attacker can inject a truncated TCP packet, which will lead to an out-of-bound read from the packet buffer.
Does this matter?
Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own.
Description
Contiki-NG is an operating system for internet-of-things devices. In versions 4.9 and prior, when a packet is received, the Contiki-NG network stack attempts to start the periodic TCP timer if it is a TCP packet with the SYN flag set. But the implementation does not first verify that a full TCP header has been received. Specifically, the implementation attempts to access the flags field from the TCP buffer in the following conditional expression in the `check_for_tcp_syn` function. For this reason, an attacker can inject a truncated TCP packet, which will lead to an out-of-bound read from the packet buffer. As of time of publication, a patched version is not available. As a workaround, one can apply the changes in Contiki-NG pull request #2510 to patch the system.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.39% probability · 32th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- contiki-ng/contiki-ng
- Source
- security-advisories@github.com
References
- https://github.com/contiki-ng/contiki-ng/pull/2510Issue Tracking, Patch
- https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8cVendor Advisory
- https://github.com/contiki-ng/contiki-ng/pull/2510Issue Tracking, Patch
- https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8cVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.