Open vSwitch (aka openvswitch) 2.11.0 through 2.15.0 has a use-after-free in decode_NXAST_RAW_ENCAP (called from ofpact_decode and ofpacts_decode) during the decoding of a RAW_ENCAP action.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openvswitch | Openvswitch | 2.11.0 (including) | 2.15.0 (including) |
| Fast Datapath for Red Hat Enterprise Linux 7 | RedHat | openvswitch2.11-0:2.11.3-89.el7fdp | * |
| Fast Datapath for Red Hat Enterprise Linux 7 | RedHat | openvswitch2.13-0:2.13.0-102.el7fdp | * |
| Fast Datapath for Red Hat Enterprise Linux 8 | RedHat | openvswitch2.11-0:2.11.3-86.el8fdp | * |
| Fast Datapath for Red Hat Enterprise Linux 8 | RedHat | openvswitch2.13-0:2.13.0-114.el8fdp | * |
| Fast Datapath for Red Hat Enterprise Linux 8 | RedHat | openvswitch2.15-0:2.15.0-24.el8fdp | * |
| Red Hat OpenShift Container Platform 4.9 | RedHat | openvswitch2.15-0:2.15.0-28.el8fdp | * |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | RedHat | openvswitch2.11-0:2.11.3-89.el7fdp | * |
| Openvswitch | Ubuntu | esm-infra/focal | * |
| Openvswitch | Ubuntu | focal | * |
| Openvswitch | Ubuntu | groovy | * |
| Openvswitch | Ubuntu | hirsute | * |
| Openvswitch | Ubuntu | trusty | * |
| Openvswitch | Ubuntu | xenial | * |
Potential Mitigations
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27851
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yaml
- https://github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58f
- https://github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3
- https://github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35
- https://github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2
- https://github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575
- https://github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2
- https://security.gentoo.org/glsa/202311-16
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27851
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yaml
- https://github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58f
- https://github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3
- https://github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35
- https://github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2
- https://github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575
- https://github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2
- https://security.gentoo.org/glsa/202311-16