Cap'n Proto is a data interchange format and remote procedure call (RPC) system. Cap'n Proro prior to versions 0.7.1, 0.8.1, 0.9.2, and 0.10.3, as well as versions of Cap'n Proto's Rust implementation prior to 0.13.7, 0.14.11, and 0.15.2 are vulnerable to out-of-bounds read due to logic error handling list-of-list. This issue may lead someone to remotely segfault a peer by sending it a malicious message, if the victim performs certain actions on a list-of-pointer type. Exfiltration of memory is possible if the victim performs additional certain actions on a list-of-pointer type. To be vulnerable, an application must perform a specific sequence of actions, described in the GitHub Security Advisory. The bug is present in inlined code, therefore the fix will require rebuilding dependent applications. Cap'n Proto has C++ fixes available in versions 0.7.1, 0.8.1, 0.9.2, and 0.10.3. The `capnp` Rust crate has fixes available in versions 0.13.7, 0.14.11, and 0.15.2.
Created capnproto tracking bugs for this issue: Affects: epel-all [bug 2150075] Affects: fedora-all [bug 2150076] Created cri-o tracking bugs for this issue: Affects: fedora-all [bug 2150078] Created rust-capnp tracking bugs for this issue: Affects: fedora-all [bug 2150077]
This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.12 Via RHSA-2023:1408 https://access.redhat.com/errata/RHSA-2023:1408
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2022-46149