CVE-2021-34548: High severity torproject Tor vulnerability
An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-003. An attacker can forge RELAYEND or RELAYRESOLVED to bypass the intended access control for ending a stream.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
alpine/torto a version that resolves this vulnerability.Fixed in 0.4.4.9-r0 - Upgrade
Upgrade
Torto a version that resolves this vulnerability.Fixed in 0.4.6.5
Event History
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-34548.
What is the severity of CVE-2021-34548?
The severity of CVE-2021-34548 is high with a severity value of 7.5.
How does CVE-2021-34548 affect Tor?
CVE-2021-34548 affects Tor versions up to 0.4.6.5, allowing an attacker to bypass access control for ending a stream by forging RELAY_END or RELAY_RESOLVED messages.
How can I fix CVE-2021-34548?
To fix CVE-2021-34548, users should upgrade to Tor version 0.4.6.5 or later.
Where can I find more information about CVE-2021-34548?
More information about CVE-2021-34548 can be found at the following references: [1] [2] [3].