CVE-2017-8819
What it is
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, the replay-cache protection mechanism is ineffective for v2 onion services, aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 1.9% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.9% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.9% · EPSS, next 30 days
- Record status
- Modified
Affected
- Tor Project Tor < 0.2.5.16
- Tor Project Tor < 0.2.8.17
- Tor Project Tor < 0.2.9.14
- Tor Project Tor < 0.3.0.13
- Tor Project Tor < 0.3.1.9
- Debian Linux 8.0
- Debian Linux 9.0
Attack profile CVSS 3.0 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2017-8819.md and follow it. Check whether this project is affected by CVE-2017-8819. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516
- https://bugs.torproject.org/24244
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516
- https://bugs.torproject.org/24244
References
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516
- https://bugs.torproject.org/24244
- https://www.debian.org/security/2017/dsa-4054
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516
- https://bugs.torproject.org/24244
- https://www.debian.org/security/2017/dsa-4054