CVE-2017-14063

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-08-31 · updated 2026-06-17
Weakness: CWE-20

Description

Async Http Client (aka async-http-client) before 2.0.35 can be tricked into connecting to a host different from the one extracted by java.net.URI if a '?' character occurs in a fragment identifier. Similar bugs were previously identified in cURL (CVE-2016-8624) and Oracle Java 8 java.net.URL.

Affected products

AsyncHttpClient async-http-client: before 2.0.35 — fixed in 2.0.35

How to fix

Upgrade to a fixed version: AsyncHttpClient async-http-client 2.0.35. Check the vendor advisory for mitigations.

References

http://openwall.com/lists/oss-security/2017/08/31/4
https://access.redhat.com/errata/RHSA-2018:2669
https://github.com/AsyncHttpClient/async-http-client/issues/1455
https://lists.apache.org/thread.html/r04b15fd898a6b1612153543375daaa8145a0fd1804ec9fa2e0d95c97%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r0a6b6429a7558051dbb70bd06584b4b1c334a80ec9203d3d39b7045a%40%3Ccommits.tez.apache.org%3E
https://lists.apache.org/thread.html/r14a74d204f285dd3a4fa203de6dbb4e741ddb7fdfff7915590e5b3db%40%3Cdev.tez.apache.org%3E
https://lists.apache.org/thread.html/r3df4b7ccc363b4850a24842138117aa4451b875bc4773a845b828fc6%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r41a0e2c36f7d1854a4d56cb1e4aa720ef501782d887ece1c9b1e2d60%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r4ebb9596d890f3528630492bd78237b3eef06f093bac238a0da9b630%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r5b8666c4414500ff6e993bfa69cb6afa19b1b67c4585a045c0c21662%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r5f07c30721503d4c02d5451f77a611a1a0bb2a94ddcdf071c9485ea3%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r5f794dc07913c5f2ec08f540813b40e61b562d36f8b1f916e8705c56%40%3Cissues.tez.apache.org%3E

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