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Gentoo: GLSA-202107-25 Medium Severity: Multiple Tor Vulnerabilities

gentoo
Calendar Grey July 9, 2021
Dist Gentoo Esm H88
Several vulnerabilities found in Tor could result in Denial of Service; guidance on updates issued for impacted users.
Multiple vulnerabilities have been found in Tor, the worst of which could result in a Denial of Service condition.

Summary

Multiple vulnerabilities have been discovered in Tor. Please review the CVE identifiers referenced below for details.

Topics%20covered

Topics Covered

security advisory Gentoo security issue software update vulnerability Denial of Service Tor

Resolution

All Tor 0.4.6.x users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-vpn/tor-0.4.6.5"
All Tor 0.4.5.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-vpn/tor-0.4.5.9"
All Tor 0.4.4.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-vpn/tor-0.4.4.9"

References

[ 1 ] CVE-2021-28089 https://nvd.nist.gov/vuln/detail/CVE-2021-28089 [ 2 ] CVE-2021-28090 https://nvd.nist.gov/vuln/detail/CVE-2021-28090 [ 3 ] CVE-2021-34548 https://nvd.nist.gov/vuln/detail/CVE-2021-34548 [ 4 ] CVE-2021-34549 https://nvd.nist.gov/vuln/detail/CVE-2021-34549 [ 5 ] CVE-2021-34550 https://nvd.nist.gov/vuln/detail/CVE-2021-34550

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202107-25
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity
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Severity: Normal
Title: Tor: Multiple vulnerabilities
Date: July 10, 2021
Bugs: #776586, #795969
ID: 202107-25

Topics%20covered

Topics Covered

security advisory Gentoo security issue software update vulnerability Denial of Service Tor

Synopsis

Multiple vulnerabilities have been found in Tor, the worst of which could result in a Denial of Service condition.

Background

Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-vpn/tor < 0.4.6.5 >= 0.4.6.5 >= 0.4.5.9 >= 0.4.4.9

Impact

===== Please review the referenced CVE identifiers for details.

Workaround

There is no known workaround at this time.