CVE-2018-0490

Description

An issue was discovered in Tor before 0.2.9.15, 0.3.1.x before 0.3.1.10, and 0.3.2.x before 0.3.2.10. The directory-authority protocol-list subprotocol implementation allows remote attackers to cause a denial of service (NULL pointer dereference and directory-authority crash) via a misformatted relay descriptor that is mishandled during voting.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.03% Top 25%
Vendor Advisory debian.org Vendor Advisory torproject.org Vendor Advisory torproject.org
Affected: n/a Tor
Published at:
Updated at:

References

Link Tags
https://trac.torproject.org/projects/tor/ticket/25074 vendor advisory
https://www.debian.org/security/2018/dsa-4183 third party advisory vendor advisory
https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-0490?
CVE-2018-0490 has been scored as a high severity vulnerability.
How to fix CVE-2018-0490?
To fix CVE-2018-0490, 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-2018-0490 being actively exploited in the wild?
It is possible that CVE-2018-0490 is being exploited or will be exploited in a near future based on public information. 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-2018-0490?
CVE-2018-0490 affects n/a Tor.
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