Date: Sat, 22 Sep 2018 19:46:45 +0300 From: Ariel Zelivansky <ariel.zelivans@...il.com> To: oss-security@...ts.openwall.com Cc: Terry Chia <terrycwk1994@...il.com> Subject: Re: CVE-2018-8023: A remote attacker can exploit a vulnerability in the JWT implementation to gain unauthenticated access to Mesos Executor HTTP API. 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@...che.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
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