CVE-2017-8820

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, remote attackers can cause a denial of service (NULL pointer dereference and application crash) against directory authorities via a malformed descriptor, aka TROVE-2017-010.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.82% Top 30%
Vendor Advisory debian.org Vendor Advisory torproject.org Vendor Advisory torproject.org
Affected: n/a 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
Published at:
Updated at:

References

Link Tags
https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516 vendor advisory
https://www.debian.org/security/2017/dsa-4054 third party advisory vendor advisory
https://bugs.torproject.org/24245 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-8820?
CVE-2017-8820 has been scored as a high severity vulnerability.
How to fix CVE-2017-8820?
To fix CVE-2017-8820, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-8820 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-8820 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-8820?
CVE-2017-8820 affects n/a 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.
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