JLine: ReDoS in Built-in Less Viewer Search
18Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5
exploitation probability
—
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
jline · jline3References
https://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541https://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206aehttps://github.com/jline/jline3/pull/2012https://github.com/jline/jline3/pull/2018https://github.com/jline/jline3/releases/tag/4.3.1https://github.com/jline/jline3/releases/tag/jline-3.30.15https://github.com/jline/jline3/security/advisories/GHSA-2v9w-34q6-wpqx