CVE-2022-35926
Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG, attackers can send neighbor solicitation packets that trigger an out-of-bounds read.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Contiki-NG is an open-source, cross-platform operating system for IoT devices. Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG, attackers can send neighbor solicitation packets that trigger an out-of-bounds read. The problem exists in the module os/net/ipv6/uip-nd6.c, where memory read operations from the main packet buffer, <code>uip_buf</code>, are not checked if they go out of bounds. In particular, this problem can occur when attempting to read the 2-byte option header and the Source Link-Layer Address Option (SLLAO). This attack requires ipv6 be enabled for the network. The problem has been patched in the develop branch of Contiki-NG. The upcoming 4.8 release of Contiki-NG will include the patch.Users unable to upgrade may apply the patch in Contiki-NG PR #1654.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.19% probability · 66th 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/1654Patch, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/pull/1654/commits/a4597001d50a04f4b9c78f323ba731e2f979802cPatch, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-4hpq-4f53-w386Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/pull/1654Patch, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/pull/1654/commits/a4597001d50a04f4b9c78f323ba731e2f979802cPatch, Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8Third Party Advisory
- https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-4hpq-4f53-w386Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.