CVE-2021-38385: torproject tor Reachable Assertion
CVSS: 7.5v3.1HighModified
AliasesMGASA-2021-0426openSUSE-SU-2021:1178-1openSUSE-SU-2021:1192-1UBUNTU-CVE-2021-38385DEBIAN-CVE-2021-38385DSA-4961-1openSUSE-SU-2021:1169-1
Published 30-08-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-38385 is a high (CVSS 7.5) Reachable Assertion vulnerability in torproject tor. EPSS estimates a 1.69% chance of exploitation in the next 30 days, higher than 76.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.69%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 30-08-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Tor before 0.3.5.16, 0.4.5.10, and 0.4.6.7 mishandles the relationship between batch-signature verification and single-signature verification, leading to a remote assertion failure, aka TROVE-2021-007.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.69%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
0.00 pp
From 1.69% on 18-09-2026
18-09-202618-10-2026
EPSS score1.69%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.torproject.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Opensuse2 products
- tor&distro=openSUSE Leap 15.2< 0.4.6.7-lp152.2.15.1
- tor&distro=openSUSE Leap 15.3< 0.4.6.7-bp153.2.6.1
Suse2 products
- tor&distro=SUSE Package Hub 15 SP2< 0.4.6.7-bp152.2.15.1
- tor&distro=SUSE Package Hub 15 SP3< 0.4.6.7-bp153.2.6.1
Debian1 product
- tor< 0.4.5.10-1 | < 0.3.5.16-1 | < 0.4.5.10-1~deb11u1
Mageia1 product
- tor< 0.3.5.16-1.mga8
Torproject1 product
- tor< 0.3.5.16 | ≥ 0.4.0.0, < 0.4.5.10 | ≥ 0.4.6.0, < 0.4.6.7
Ubuntu1 product
- tor< 0.2.9.14-1ubuntu1~16.04.3+esm1 | < 0.3.2.10-1ubuntu0.2~esm2 | < 0.4.2.7-1ubuntu0.1~esm1
6 vendors · 8 products
References
15 links- security.gentoo.org/glsa/202305-11Vendor Advisory
- lists.opensuse.org/archives/…Advisory
Show all 15 references
- lists.opensuse.org/archives/…Advisory
