CVE-2021-1398
Description
A vulnerability in the boot logic of Cisco IOS XE Software could allow an authenticated, local attacker with level 15 privileges or an unauthenticated attacker with physical access to execute arbitrary code on the underlying Linux operating system of an affected device. This vulnerability is due to incorrect validations of specific function arguments that are passed to the boot script. An attacker could exploit this vulnerability by tampering with a specific file, which an affected device would process during the initial boot process. On systems that are protected by the Unified Extensible Firmware Interface (UEFI) secure boot feature, a successful exploit could allow the attacker to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios_xe | 3.7.0bs, 3.7.0s, 3.7.0xas, 3.7.0xbs, 3.7.1as, 3.7.1s, 3.7.2s, 3.7.2ts, 3.7.3s, 3.7.4as, 3.7.4s, 3.7.5s, 3.7.6s, 3.7.7s, 3.7.8s, 3.8.0s, 3.8.1s, 3.8.2s, 3.9.0as, 3.9.0s, 3.9.0xas, 3.9.1as, 3.9.1s, 3.9.2s, 3.10.0s, 3.10.1s, 3.10.1xbs, 3.10.1xcs, 3.10.2as, 3.10.2s, 3.10.2ts, 3.10.3s, 3.10.4s, 3.10.5s, 3.10.6s, 3.10.7s, 3.10.8as, 3.10.8s, 3.10.9s, 3.10.10s, 3.11.0s, 3.11.1s, 3.11.2s, 3.11.3s, 3.11.4s, 3.12.0as, 3.12.0s, 3.12.1s, 3.12.2s, 3.12.3s, 3.12.4s, 3.13.0as, 3.13.0s, 3.13.1s, 3.13.2as, 3.13.2s, 3.13.3s, 3.13.4s, 3.13.5as, 3.13.5s, 3.13.6as, 3.13.6bs, 3.13.6s, 3.13.7as, 3.13.7s, 3.13.8s, 3.13.9s, 3.13.10s, 3.14.0s, 3.14.1s, 3.14.2s, 3.14.3s, 3.14.4s, 3.15.0s, 3.15.1cs, 3.15.1s, 3.15.1xbs, 3.15.2s, 3.15.2xbs, 3.15.3s, 3.15.4s, 3.16.0as, 3.16.0bs, 3.16.0cs, 3.16.0s, 3.16.1as, 3.16.1s, 3.16.2as, 3.16.2bs, 3.16.2s, 3.16.3as, 3.16.3s, 3.16.4as, 3.16.4bs, 3.16.4cs, 3.16.4ds, 3.16.4es, 3.16.4gs, 3.16.4s, 3.16.5as, 3.16.5bs, 3.16.5s, 3.16.6bs, 3.16.6s, 3.16.7as, 3.16.7bs, 3.16.7s, 3.16.8s, 3.16.9s, 3.16.10as, 3.16.10s, 3.17.0s, 3.17.1as, 3.17.1s, 3.17.2s, 3.17.3s, 3.17.4s, 3.18.0as, 3.18.0s, 3.18.0sp, 3.18.1asp, 3.18.1bsp, 3.18.1csp, 3.18.1gsp, 3.18.1hsp, 3.18.1isp, 3.18.1s, 3.18.1sp, 3.18.2asp, 3.18.2s, 3.18.2sp, 3.18.3asp, 3.18.3bsp, 3.18.3s, 3.18.3sp, 3.18.4s, 3.18.4sp, 3.18.5sp, 3.18.6sp, 3.18.7sp, 3.18.8asp, 3.18.8sp, 16.1.1, 16.1.2, 16.1.3, 16.2.1, 16.2.2, 16.3.1, 16.3.1a, 16.3.2, 16.3.3, 16.3.4, 16.3.5, 16.3.5b, 16.3.6, 16.3.7, 16.3.8, 16.3.9, 16.3.10, 16.4.1, 16.4.2, 16.4.3, 16.5.1, 16.5.1a, 16.5.1b, 16.5.2, 16.5.3, 16.6.1, 16.6.2, 16.6.3, 16.6.4, 16.6.4a, 16.6.4s, 16.6.5, 16.6.5a, 16.6.5b, 16.6.6, 16.6.7, 16.6.7a, 16.6.8, 16.7.1, 16.7.1a, 16.7.1b, 16.7.2, 16.7.3, 16.7.4, 16.8.1, 16.8.1a, 16.8.1b, 16.8.1c, 16.8.1d, 16.8.1e, 16.8.1s, 16.8.2, 16.8.3, 16.9.1, 16.9.1a, 16.9.1b, 16.9.1c, 16.9.1d | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.