CVE-2022-43552
Description
A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 7.86.0-3 |
| sid | Fixed | 7.86.0-3 |
| forky | Fixed | 7.86.0-3 |
| bullseye | Fixed | 7.74.0-1.3+deb11u5 |
| bookworm | Fixed | 7.86.0-3 |
Red Hat Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
References
- https://access.redhat.com/errata/RHSA-2023:2478
- https://security-tracker.debian.org/tracker/CVE-2022-43552
- https://www.suse.com/security/cve/CVE-2022-43552.html
- https://access.redhat.com/errata/RHSA-2023:2963
- https://bugzilla.redhat.com/2120718
- https://bugzilla.redhat.com/2152652
- https://errata.almalinux.org/8/ALSA-2023-2963.html
- https://errata.almalinux.org/9/ALSA-2023-2478.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.