Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ipvs: fix the checksum validations ip_vs_in_icmp_v6() is missing checksum validation for ICMPv6 packets from clients. In fact, as for TCP/UDP we should validate the checksum for ICMP packets only when we mangle the packets on MASQ or on reply for tunnel. Also, Sashiko points out that handle_response_icmp() being common for IPv4 and IPv6 is missing the pseudo-header calculation while validating ICMPv6 messages from real servers which is a problem if checksum is not validated by the hardware. Fix the problems by creating ip_vs_checksum_common_check() helper and use it for TCP/UDP/ICMP both for IPv4 and IPv6. Rely on the nf_checksum() for validating the ICMP messages but use it also for TCP and UDP. Use correct IP offset for IP_VS_DBG_RL_PKT for TCP/UDP/SCTP. IPVS packets (TCP/UDP/SCTP/ICMP) do not need checksum validation on LOCAL_OUT (local clients or local real servers) and on FORWARD (traffic from servers on LAN). Do it only on LOCAL_IN, in case nf_checksum() is not called on PRE_ROUTING. Also, ip_vs_checksum_complete() can be marked static.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2a3b791e6e1169f374224d164738e9f7be703d77 before d418d73acf8be62744dc47359dfdde8c2148845d; affected 2a3b791e6e1169f374224d164738e9f7be703d77 before b3869d9b54e76dff64118dee4c8fd9302fcd5171; affected 2a3b791e6e1169f374224d164738e9f7be703d77 before 9cbe2c0fdb71904ee929b1851cdc1c73341a03c0; affected 2a3b791e6e1169f374224d164738e9f7be703d77 before 00eb23829fd08df1b5e057cb6b625996a70e7e65; affected 2a3b791e6e1169f374224d164738e9f7be703d77 before 5558a85add073215b298f3e044ff9a6d86d714ae; affected 2a3b791e6e1169f374224d164738e9f7be703d77 before e876b75b9020a97bbdc79721e7fc749024891c65 |
| Linux / Linux | affected 2.6.28; unaffected 0 before 2.6.28; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d418d73acf8be62744dc47359dfdde8c2148845d
- https://git.kernel.org/stable/c/b3869d9b54e76dff64118dee4c8fd9302fcd5171
- https://git.kernel.org/stable/c/9cbe2c0fdb71904ee929b1851cdc1c73341a03c0
- https://git.kernel.org/stable/c/00eb23829fd08df1b5e057cb6b625996a70e7e65
- https://git.kernel.org/stable/c/5558a85add073215b298f3e044ff9a6d86d714ae
- https://git.kernel.org/stable/c/e876b75b9020a97bbdc79721e7fc749024891c65