CVE-2016-8860 Denial of service in n/a
Remote attackers can crash Tor clients, relays, or authorities by sending crafted data that triggers a buffer handling error.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-8860?
CVE-2016-8860 is a high-severity denial of service vulnerability in n/a, published on 4 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.
Weakness: CWE-119
Which versions are affected by CVE-2016-8860?
It affects 1 product.
Products include Torproject Tor.
How do I fix CVE-2016-8860?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2016-8860 being exploited?
There is no known exploitation of CVE-2016-8860 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2016-8860, DLA-663-1, DSA-3694-1, GHSA-r9f4-f6pw-gqm4, MGASA-2016-0356, UBUNTU-CVE-2016-8860.