CVE-2017-8821: debian debian_linux
Vulnerability summary
CVE-2017-8821 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 1.96% chance of exploitation in the next 30 days, higher than 79.9% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 03-12-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, an attacker can cause a denial of service (application hang) via crafted PEM input that signifies a public key requiring a password, which triggers an attempt by the OpenSSL library to ask the user for the password, aka TROVE-2017-011.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.96%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
0.00 pp
From 1.96% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- tor< 0.3.1.9-1
- debian_linuxEOL8.0 | 9.0
Tor_project1 product
- tor< 0.2.5.16 | ≥ 0.2.6, < 0.2.8.17 | ≥ 0.2.9, < 0.2.9.14 | ≥ 0.3.0, < 0.3.0.13 | ≥ 0.3.1, < 0.3.1.9
Ubuntu1 product
- tor< 0.2.4.27-1ubuntu0.1 | < 0.2.9.14-1ubuntu1~16.04.2
3 vendors · 4 products
References
6 links- blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516X Refsource CONFIRMVendor AdvisoryREPORT