Path Traversal in Apache Flink
CVE-2020-17518
Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system, through a maliciously modified HTTP HEADER. The files can be written to any location accessible by Fl…
EPSS: 0.500 (98.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Apache Flink
- Apache Software Foundation Flink — versions Apache Flink 1.5.1 to 1.11.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2020-17518?
- CVE-2020-17518 is a high-severity vulnerability in Apache Flink, classified under Relative Path Traversal. CVSS score: 7.5/10. Published 2021-01-05.
- How severe is CVE-2020-17518?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-17518 known to be exploited?
- 58 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.