CVE-2018-0490
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.64% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- torproject/tor · debian/debian linux
- Source
- security@debian.org
References
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915Vendor Advisory
- https://trac.torproject.org/projects/tor/ticket/25074Vendor Advisory
- https://www.debian.org/security/2018/dsa-4183Third Party Advisory
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915Vendor Advisory
- https://trac.torproject.org/projects/tor/ticket/25074Vendor Advisory
- https://www.debian.org/security/2018/dsa-4183Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.