CVE-2023-37459

MEDIUM EPSS 30.5%
Published Sep 15, 20232y ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
30.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
contiki-ngcontiki-ng* ≤4.9

References 2

  • github.com https://github.com/contiki-ng/contiki-ng/pull/2510
    Issue TrackingPatch
  • github.com https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8c
    Vendor Advisory

Remediation

  • github.com https://github.com/contiki-ng/contiki-ng/pull/2510
    Issue TrackingPatch