USN-5036-1: tor Ubuntu

CVSS: UnknownPublished
Published 04-10-2022Last modified 29-06-2026
Open JSON

Vulnerability summary

USN-5036-1 is a vulnerability in tor Ubuntu with no CVSS score yet.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 7 · Downstream 0 · Related 7
CVE-2019-8955CVE-2021-28089CVE-2021-28090CVE-2021-34548CVE-2021-34549CVE-2021-34550

Timeline

  1. 04-10-2022
    PublishedVulnerability first disclosed.
  2. 29-06-2026
    Last modifiedVulnerability information updated.

Description

tor vulnerabilities It was discovered that Tor incorrectly handled certain memory operations. A remote attacker could use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 ESM. (CVE-2019-8955) It was discovered that Tor did not properly handle the input length to dump_desc() function. A remote attacker could use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-28089) It was discovered that Tor did not properly sanitize the relay nickname in dirvote_add_signatures_to_pending_consensus() function. An attacker could possibly use this issue to cause an assertion failure and then cause a denial of service. (CVE-2021-28090) It was discovered that Tor did not properly validate the layer hint on half-open streams. A remote attacker could possibly use this issue to bypass the access control, leading to remote code execution. This issue only affected Ubuntu 20.04 ESM. (CVE-2021-34548) It was discovered that Tor was using an insecure hash function. A remote attacker could use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-34549) It was discovered that Tor did not properly manage memory under certain circumstances. If a user were tricked into opening a specially crafted request, a remote attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly reading sensitive data. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-34550) It was discovered that Tor mishandles the relationship between batch-signature verification and single-signature verification. An attacker could possibly use this issue to cause an assertion failure and then cause a denial of service. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2021-38385)

CVSS metrics

Risk metrics not yet published.

EPSS trend

No EPSS score has been published for this record yet.

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

No weakness data has been published for this record.

Affected systems

Ubuntu1 product
  • tor< 0.2.4.27-1ubuntu0.1+esm2 | < 0.2.9.14-1ubuntu1~16.04.3+esm1 | < 0.3.2.10-1ubuntu0.2~esm2 | < 0.4.2.7-1ubuntu0.1~esm1

1 vendor · 1 product

References

8 links