Sorry, in Solr 8 and master there are some additional users of Jackson. But they still don't appear to use default typing or unrestricted subtypes.
On Thu, 19 Dec 2019 at 16:50, Colvin Cowie <colvin.cowie....@gmail.com> wrote: > Hi, > > We've got users on Solr 6 (and use Jackson ourselves), so I had a look at > this CVE and related Jackson exploits, to see whether they are actually > exploitable in Solr. > > - What parts of Solr actually use Jackson (I thought noggit was used > for the JSON de/serialization)? > - Do any of the object mappers used enable default typing? (which is > necessary to exploit CVE-2017-7525 > https://adamcaudill.com/2017/10/04/exploiting-jackson-rce-cve-2017-7525/ > ) > - Is polymorphism used with Jackson without restricting subtypes (e.g. > @JsonTypeInfo with JsonTypeInfo.Id.CLASS, which allows other exploits like > CVE-2017-15095 > > https://medium.com/@cowtowncoder/on-jackson-cves-dont-panic-here-is-what-you-need-to-know-54cd0d6e8062 > ) > > Aside from test classes, the only users of Jackson appear to be > > - org.apache.solr.analytics.AnalyticsRequestParser > - org.apache.solr.prometheus.scraper.SolrScraper > > From what I can see in the source on master and the 7_7 branch default > typing isn't ever enabled, and @JsonTypeInfo is restricted to named > subtypes. > > In the 6_6 branch source it seems Jackson is only used in a handful of > tests. > Prior to Solr 6.3 (https://issues.apache.org/jira/browse/SOLR-9589) > org.apache.solr.client.solrj.response.DelegationTokenResponse.JsonMapResponseParser > constructed an ObjectMapper without configuration. > > So, as far as I can see, the polymorphic deserialization Remote Code > Execution vulnerabilities on (older versions of) Jackson shouldn't actually > be exploitable in Solr 7.7... but I could be wrong, and new vulnerabilities > may still be discovered. > > Colvin > > > On Wed, 18 Dec 2019 at 18:16, Kevin Risden <kris...@apache.org> wrote: > >> There are no specific plans for any 7.x branch releases that I'm aware of. >> Specifically for SOLR-13110, that required upgrading Hadoop 2.x to 3.x for >> specifically jackson-mapper-asl and there are no plans to backport that to >> 7.x even if there was a future 7.x release. >> >> Kevin Risden >> >> >> On Wed, Dec 18, 2019 at 8:44 AM Mehai, Lotfi <lme...@ptfs.com.invalid> >> wrote: >> >> > Hello; >> > >> > We are using Solr 7.7.0. The CVE-2017-7525 have been fixed for Solr 8.x. >> > https://issues.apache.org/jira/browse/SOLR-13110 >> > >> > When the fix will be available for Solr 7.7.x >> > >> > Lotfi >> > >> >
