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Debian Security Advisory DSA 3216-1 (tor - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

7 years ago

Modified

Modified

8 months ago

Summary

Several vulnerabilities have been discovered in Tor, a connection-based low-latency anonymous communication system: CVE-2015-2928disgleirio discovered that a malicious client could trigger an assertion failure in a Tor instance providing a hidden service, thus rendering the service inaccessible. CVE-2015-2929DonnchaC discovered that Tor clients would crash with an assertion failure upon parsing specially crafted hidden service descriptors. Introduction points would accept multiple INTRODUCE1 cells on one circuit, making it inexpensive for an attacker to overload a hidden service with introductions. Introduction points now no longer allow multiple cells of that type on the same circuit.

Affected Software

Affected Software

tor on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (wheezy), these problems have been fixed in version 0.2.4.27-1. For the unstable distribution (sid), these problems have been fixed in version 0.2.5.12-1. For the experimental distribution, these problems have been fixed in version 0.2.6.7-1. We recommend that you upgrade your tor packages.

Common Vulnerabilities and Exposures (CVE)