CVE-2020-17519
Apache Flink directory traversal attack: reading remote files through the REST API
Exploited in the wild. In CISA KEV since 2024‑05‑23. Fixed in 1.11.3.
What to do
Find your product and version, then upgrade to the build on the right.
- Apache Software Foundation Apache FlinkAffected: Apache Flink 1.11.0 to 1.11.2Upgrade to: not statedStated by: CVE record
- Maven org.apache.flink:flink-runtime_2.11Affected: ≥ 1.11.0, < 1.11.3Upgrade to: 1.11.3Stated by: GitHub advisory
- Maven org.apache.flink:flink-runtime_2.12Affected: ≥ 1.11.0, < 1.11.3Upgrade to: 1.11.3Stated by: GitHub advisory
Versions as the sources state them. Full version matrix after sign-in
Coverage timeline
0 publishersAdded to CISA KEV catalog
Sourced from public security reporting — each date is when it was published, not when it happened.
What it is
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2024-05-23.
US federal agencies must remediate by 2024-06-13.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Public exploits
3 sources with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
98% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
The patch came 130 days before any public exploit.
- OpenVAS check added
- Public exploit / PoCsource: exploit-dbnuclei check added
- Patch availablerecord updated
- Added to CISA KEV
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- openwall.com/lists/oss-security/2021/01/05/2&
- exploit-db.com/exploits/49398&
- github.com/murataydemir/CVE-2020-17519
And 33 more references. See all after sign-in
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