SSSD / sssd

#3250 Use-after free in resolver in case the fd is writeable and readable at the same time
Closed: Fixed Opened by jhrozek.

Closed: Fixed
Reopen Issue

Carl Henrik Holth Lunde found a bug in SSSD resolver code in case the file descriptor we use to integrate c-ares with libtevent is both readable and writable at the same time. In this case, we process the request twice, both for TEVENT_FD_WRITE and TEVENT_FD_READ. The first callback processing frees the internal watch structure and the second callback invocation accesses invalid memory.

Carl also proposed a patch for this bug himself.

Linked to Bugzilla bug: https://bugzilla.redhat.com/show_bug.cgi?id=1400422

rhbz: => [https://bugzilla.redhat.com/show_bug.cgi?id=1400422 1400422]

Fields changed

version: 1.14.2 => 1.13.4

Fields changed

milestone: NEEDS_TRIAGE => SSSD 1.13.5
  • master: 9676b464dd428557ff5a648e1351a3972440396f
  • sssd-1-14: fefdd70237cbe82af7d8845131e45401e73b3b07
  • sssd-1-13: 07959a61f12cd9e60dff6651f4e1ce05c83c4da7

resolution: => fixed
status: new => closed

Metadata Update from @jhrozek:
- Issue set to the milestone: SSSD 1.13.5

SSSD is moving from Pagure to Github. This means that new issues and pull requests
will be accepted only in SSSD's github repository.

This issue has been cloned to Github and is available here:
- https://github.com/SSSD/sssd/issues/4283

If you want to receive further updates on the issue, please navigate to the github issue
and click on subscribe button.

Thank you for understanding. We apologize for all inconvenience.
Metadata
None
None
None
None
Low
defect
Async Resolver
1.13.4
0
0
0
https://bugzilla.redhat.com/show_bug.cgi?id=1400422
0
0
0
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