CVE-2020-10593
Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), aka TROVE-2020-004.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), aka TROVE-2020-004. This occurs in circpad_setup_machine_on_circ because a circuit-padding machine can be negotiated twice on the same circuit.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.34% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- torproject/tor · opensuse/backports sle · opensuse/leap
- Source
- cve@mitre.org
EPSS 2.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00045.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00052.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-50Third Party Advisory
- https://trac.torproject.org/projects/tor/ticket/33619Issue Tracking, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00045.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00052.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-50Third Party Advisory
- https://trac.torproject.org/projects/tor/ticket/33619Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.