Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before 6253dfee5afba536bb54fc6fe6c091c3758fafe1; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before 65bf0d2b6e914f1448d6a2fde193dcf60936a651; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before 138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before 83b17872e3166c295c599279fc9562ac3840c638; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before 497c6bae5167428596575f20af6613ff5671f383; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before dfd1894cb64cbd8758b461ed713800fe73db4f82; affected 778c1144771f0064b6f51bee865cceb0d996f2f9 before 6255da28d4bb5349fe18e84cb043ccd394eba75d |
| Linux / Linux | affected 2.6.18; unaffected 0 before 2.6.18; 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 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1
- https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651
- https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf
- https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2
- https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638
- https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383
- https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82
- https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.