Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ipv4: fib: Don't ignore error route in local/main tables. When CONFIG_IP_MULTIPLE_TABLES is enabled but no rule is added, fib_lookup() performs route lookup directly on two tables. Since the first lookup does not properly bail out, the result of an error route in the merged local/main table could be overwritten by another route in the default table: # unshare -n # ip link set lo up # ip route add 192.168.0.0/24 dev lo table 253 # ip route add unreachable 192.168.0.0/24 # ip route get 192.168.0.1 192.168.0.1 dev lo table default uid 0 cache <local> Once a random rule is added, the error route is respected: # ip rule add table 0 # ip rule del table 0 # ip route get 192.168.0.1 RTNETLINK answers: No route to host Let's fix the inconsistent behaviour.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f4530fa574df4d833506c53697ed1daa0d390bf4 before a29e95fbc51e8a1b932773fd0e259b2080881443; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before 5ae18d87a45698e8244d0fcba64c658c35a7dd3d; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before 9127589aabdee588278e8d0d0bd3709a760a92c8; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before 49eaf1403201357762d745a35882fb734107d763; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before fd25996f57a95d56bc568c89b4921edcf334b7d8; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before 828fad4fd418bcdb9f5d66fec0d184c52a85ec31; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before a668fa160247d7bbe921548cb845f607b8b9305f; affected f4530fa574df4d833506c53697ed1daa0d390bf4 before b72f0db64205d9ce462038ba995d5d31eff32dc1 |
| Linux / Linux | affected 3.6; unaffected 0 before 3.6; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a29e95fbc51e8a1b932773fd0e259b2080881443
- https://git.kernel.org/stable/c/5ae18d87a45698e8244d0fcba64c658c35a7dd3d
- https://git.kernel.org/stable/c/9127589aabdee588278e8d0d0bd3709a760a92c8
- https://git.kernel.org/stable/c/49eaf1403201357762d745a35882fb734107d763
- https://git.kernel.org/stable/c/fd25996f57a95d56bc568c89b4921edcf334b7d8
- https://git.kernel.org/stable/c/828fad4fd418bcdb9f5d66fec0d184c52a85ec31
- https://git.kernel.org/stable/c/a668fa160247d7bbe921548cb845f607b8b9305f
- https://git.kernel.org/stable/c/b72f0db64205d9ce462038ba995d5d31eff32dc1
ADP enrichment
No English description supplied.
No references supplied.