7.5

CVE-2020-15572: torproject tor Out-of-bounds Read

CVSS: 7.5v3.1HighModified
AliasesDEBIAN-CVE-2020-15572
Published 15-07-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-15572 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in torproject tor. EPSS estimates a 1.40% chance of exploitation in the next 30 days, higher than 72.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.40%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2020:1970-1OPENSUSE-SU-2024:11469-1

Timeline

  1. 15-07-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.40%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

0.00 pp

From 1.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • tor< 0.4.3.6-1
Torproject1 product
  • tor< 0.3.5.11 | > 0.4.2.0, < 0.4.2.8 | > 0.4.3.0, < 0.4.3.6 | 0.4.4.0:alpha | 0.4.4.1:alpha

2 vendors · 2 products

References

4 links