CVE-2017-0377
Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by
02 Description
Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.44% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 84.1% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-07-02 15:00Z9 YR AGO
- Last updated
- 2024-08-05 13:03Z2 YR AGO
- Reserved
- 2016-11-29
- Assigning CNA
- debian
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
- Data version
- 5.1
- Document digest
- 5e8873ce739e0f9dec28ceb9663fa723a4b9335912037af2c0bc3b36bb177019
05 Affected products
06 References
- trac.torproject.orghttps://trac.torproject.org/projects/tor/ticket/22753
- security-tracker.debian.orghttps://security-tracker.debian.org/CVE-2017-0377
- blog.torproject.orghttps://blog.torproject.org/blog/tor-0309-released-security-update-clients
- blog.torproject.orghttps://blog.torproject.org/blog/tor-0314-alpha-released-security-update-clients
- github.comhttps://github.com/torproject/tor/commit/665baf5ed5c6186d973c46cdea165c0548027350
07 Fixed in
Arch Linux
- tor Fixed in 0.3.0.9-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.