oss-sec mailing list archives
Re: CVE-2018-8023: A remote attacker can exploit a vulnerability in the JWT implementation to gain unauthenticated access to Mesos Executor HTTP API.
From: Ariel Zelivansky <ariel.zelivans () gmail com>
Date: Sat, 22 Sep 2018 19:46:45 +0300
Hi, I couldn't find the fix for this in the mesos repository and it is not documented in the CHANGELOG, could someone direct me to the fixing commit/patch? Thanks Ariel On Fri, Sep 21, 2018 at 1:50 PM, Alex R <alexr () apache org> wrote:
Severity: Important Vendor: The Apache Software Foundation Versions Affected: Apache Mesos 1.4.0 to 1.6.0 The unsupported Apache Mesos pre-1.4.0 releases may be also affected. Description: Apache Mesos can be configured to require authentication to call the Executor HTTP API using JSON Web Token (JWT). The comparison of the generated HMAC value against the provided signature in the JWT implementation used is vulnerable to a timing attack because instead of a constant-time string comparison routine a standard `==` operator has been used. A malicious actor can therefore abuse the timing difference of when the JWT validation function returns to reveal the correct HMAC value. Mitigation: pre-1.4.x users should upgrade to at least 1.4.2 1.4.x users should upgrade to 1.4.2 1.5.x users should upgrade to 1.5.2 1.6.0 users should upgrade to 1.6.1 1.7.0-dev users should obtain Mesos 1.7.0 Credit: This issue was discovered by Terry Chia (Ayrx). Alex on behalf of Mesos PMC
Current thread:
- CVE-2018-8023: A remote attacker can exploit a vulnerability in the JWT implementation to gain unauthenticated access to Mesos Executor HTTP API. Alex R (Sep 21)
- Re: CVE-2018-8023: A remote attacker can exploit a vulnerability in the JWT implementation to gain unauthenticated access to Mesos Executor HTTP API. Ariel Zelivansky (Sep 22)