Date: Mon, 24 Sep 2018 09:36:51 +0800 From: Terry Chia <terrycwk1994@...il.com> To: Ariel Zelivansky <ariel.zelivans@...il.com> Cc: oss-security@...ts.openwall.com, Alex R <alexr@...che.org> 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 Ariel, I believe the following commit contains the fix: https://github.com/apache/mesos/commit/2c282f19755ea7518caf6f43e729524b1c6bdb23 Cheers, Terry On Sun, Sep 23, 2018 at 12:46 AM Ariel Zelivansky <ariel.zelivans@...il.com> wrote: > 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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