A specially crafted Kroki diagram could lead to a stored XSS on the client side which allows attackers to perform arbitrary actions on behalf of victims. ![]() The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176.\n\nWe recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96\n\nĪn issue has been discovered in GitLab affecting all versions starting from 13.7 before 15.7.8, all versions starting from 15.8 before 15.8.4, all versions starting from 15.9 before 15.9.2. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. ![]() The ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function _speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. ![]() The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |