CVE-2017-8823
high
CVSS v3
8.1
CVSS v4 NEW
—
VIR risk
8.1
Description
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, there is a use-after-free in onion service v2 during intro-point expiration because the expiring list is mismanaged in certain error cases, aka TROVE-2017-013.
Predictions
Exploit likelihood
88%
Patch ETA
—
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
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.3.1.9-1 | |
| debian | 8.0 | affected | |
| debian | 9.0 | affected | |
| debian | bookworm | fixed | 0.3.1.9-1 |
| debian | bullseye | fixed | 0.3.1.9-1 |
| debian | forky | fixed | 0.3.1.9-1 |
| debian | sid | fixed | 0.3.1.9-1 |
| debian | trixie | fixed | 0.3.1.9-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| tor_project | tor | {"endExcluding":"0.2.5.16"} | 0.2.5.16 |
References
- https://security.archlinux.org/ASA-201712-10
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516
- https://bugs.torproject.org/24313
- https://bugs.torproject.org/24430
- https://www.debian.org/security/2017/dsa-4054
- https://security-tracker.debian.org/tracker/CVE-2017-8823
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.