CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
odhcpd is the DHCPv6, DHCPv4, and router-advertisement server used by OpenWrt. From version 17.01.0 to before version 25.12.3, odhcpd's DHCPv6 IA parser accepts an IA_NA or IA_PD option whose body is shorter than struct dhcpv6_ia_hdr, casts the option header to that full structure, and reads ia->iaid before proving that the IA body contains the IAID field. If an unauthenticated network-adjacent client places a zero-length or otherwise short IA option at the end of odhcpd's 8192-byte receive stack buffer, the IAID read crosses from data_buf into adjacent stack memory. The disclosed bytes are then reflected in the DHCPv6 reply IAID; prior ARM validation showed data_buf[8192:8196] disclosing the saved stack canary, and wider stack scans can leak ASLR-useful stack/process contents. This issue has been patched in version 25.12.3.
Засегнати продукти
- openwrt odhcpd: >= 17.01.0, < 25.12.3
Вид слабост
История
- 23 октомври 2026 Публикувано
Други уязвимости в openwrt odhcpd
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-53920
- https://nvd.nist.gov/vuln/detail/CVE-2026-53920
- https://github.com/openwrt/odhcpd/security/advisories/GHSA-p769-5v73-pc4f
- https://github.com/openwrt/odhcpd/commit/719fc3abc0d7e7059871f9f572fb05ada86b8ff2
- https://github.com/openwrt/odhcpd/commit/f2275efc72a87a95f971f159babcbadc5d241d42