Description
JLine is a Java library for handling console input. From 3.0.0 until 3.30.15 and 4.3.1, the JLine built-in less viewer passes user-controlled search and display-filter patterns from getPattern(boolean doDisplayPattern) in builtins/src/main/java/org/jline/builtins/Less.java directly to Java's backtracking regular expression engine and repeatedly applies them to file content. A nested-quantifier expression evaluated against non-matching lines can consume excessive CPU and indefinitely block the session thread, and repeated sessions in Telnet or SSH deployments can exhaust a bounded worker pool. This issue is fixed in versions 3.30.15 and 4.3.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
jline jline3
>= 3.0.0, < 3.30.15affected>= 4.0.0, < 4.3.1affected
References
- https://github.com/jline/jline3/security/advisories/GHSA-2v9w-34q6-wpqx ↗
- https://github.com/jline/jline3/pull/2012 ↗
- https://github.com/jline/jline3/pull/2018 ↗
- https://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541 ↗
- https://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206ae ↗
- https://github.com/jline/jline3/releases/tag/4.3.1 ↗
- https://github.com/jline/jline3/releases/tag/jline-3.30.15 ↗