OSSA-2023-001: Arbitrary file access through custom S3 XML entities

Date:

January 17, 2023

CVE:

CVE-2022-47950

Affects

• Swift: <2.28.1, >=2.29.0 <2.29.2, ==2.30.0

Description

Sébastien Meriot (OVH) reported a vulnerability in Swift’s S3 XML parser. By supplying specially crafted XML files an authenticated user may coerce the S3 API into returning arbitrary file contents from the host server resulting in unauthorized read access to potentially sensitive data; this impacts both s3api deployments (Rocky or later), and swift3 deployments (Queens and earlier, no longer actively developed). Only deployments with S3 compatibility enabled are affected.

Patches

• https://review.opendev.org/870823 (2023.1/antelope)

• https://review.opendev.org/870828 (Wallaby)

• https://review.opendev.org/870827 (Xena)

• https://review.opendev.org/870826 (Yoga)

• https://review.opendev.org/870825 (Zed)

Credits

• Sébastien Meriot from OVH (CVE-2022-47950)

References

• https://launchpad.net/bugs/1998625

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-47950

Notes

• The stable/wallaby branch is under extended maintenance and will receive no new point releases, but a patch for it is provided as a courtesy.