Out-of-bounds read when decompressing UDP header
Published Sep 1, 2022 · Updated Apr 23, 2025
Out-of-bounds read in Contiki-NG before 4.8 allows attackers to read beyond a packet buffer via crafted 6LoWPAN packets. In uipbuf.c, IPv6 extension-header processing casts a pointer at a computed offset without confirming that the remaining packet buffer can hold the complete UDP header. Reachability requires an affected device to accept attacker-supplied 6LoWPAN traffic; the over-read can expose memory beyond the received packet.
Summary
What happened
Out-of-bounds read in Contiki-NG before 4.8 allows attackers to read beyond a packet buffer via crafted 6LoWPAN packets. In uipbuf.c, IPv6 extension-header processing casts a pointer at a computed offset without confirming that the remaining packet buffer can hold the complete UDP header. Reachability requires an affected device to accept attacker-supplied 6LoWPAN traffic; the over-read can expose memory beyond the received packet.
The record
- CVE
- CVE-2022-36052
- Published
- Sep 1, 2022
- Updated
- Apr 23, 2025
- Vendor
- Contiki-NG
- Product
- Contiki-NG
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 1, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 4.8
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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