Paper/Archive/CVE-2020-17519

CVE-2020-17519

Apache Software Foundation Apache Flink — Apache Flink directory traversal attack: reading remote files through the REST API

KEV · due 13 Jun EPSS 98%public exploit SSVC act CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 In CISA KEV+3030.0 EPSS percentile 99.9.999 × 2020.0 Exploit: SSVC active+1010.0 SSVC exploitation: active+1010.0

Description · from the CVE record

A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.

Affected

ProductAffectedFixed inSource

Apache FlinkApache Flink 1.11.0 to 1.11.2–CNA

flink1.11.0 – 1.11.2–CISA-ADP

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: partial

References