vulnerability / NVI-00013074 / Revision 1
JLine: ReDoS via `HISTORY_IGNORE` Configuration Variable
GitHub lists this reviewed advisory for org.jline:jline-reader, org.jline:jline-reader. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
5.5 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
org.jline:jline-reader
source listed>= 4.0.0, < 4.3.1
### Summary The JLine3 `HISTORY_IGNORE` variable is converted into a Java regular expression with only partial escaping. As a result, regex metacharacters other than `*` and `:` are passed through to the regex engine. A crafted value such as `(a+)+b` can cause catastrophic backtracking each time a command line is added to history, hanging the reader thread at high CPU. ### Details In `reader/src/main/java/org/jline/reader/impl/history/DefaultHistory.java`, `matchPatterns()` converts `HISTORY_IGNORE` into a regex: ```java for (int i = 0; i < patterns.length(); i++) { char ch = patterns.charAt(i); if (ch == '\\') { ch = patterns.charAt(++i); sb.append(ch); } else if (ch == ':') { sb.append('|'); } else if (ch == '*') { sb.append('.').append('*'); } else { sb.append(ch); } } return line.matches(sb.toString()); ``` This logic translates wildcard syntax but does not escape regex metacharacters such as `(`, `)`, `+`, `?`, `{`, `}`, `[`, and `]`. Those characters therefore reach the Java regex engine unchanged. Affected source location: - `reader/src/main/java/org/jline/reader/impl/history/DefaultHistory.java` - `matchP
org.jline:jline-reader
source listed>= 3.0.0, < 3.30.15
### Summary The JLine3 `HISTORY_IGNORE` variable is converted into a Java regular expression with only partial escaping. As a result, regex metacharacters other than `*` and `:` are passed through to the regex engine. A crafted value such as `(a+)+b` can cause catastrophic backtracking each time a command line is added to history, hanging the reader thread at high CPU. ### Details In `reader/src/main/java/org/jline/reader/impl/history/DefaultHistory.java`, `matchPatterns()` converts `HISTORY_IGNORE` into a regex: ```java for (int i = 0; i < patterns.length(); i++) { char ch = patterns.charAt(i); if (ch == '\\') { ch = patterns.charAt(++i); sb.append(ch); } else if (ch == ':') { sb.append('|'); } else if (ch == '*') { sb.append('.').append('*'); } else { sb.append(ch); } } return line.matches(sb.toString()); ``` This logic translates wildcard syntax but does not escape regex metacharacters such as `(`, `)`, `+`, `?`, `{`, `}`, `[`, and `]`. Those characters therefore reach the Java regex engine unchanged. Affected source location: - `reader/src/main/java/org/jline/reader/impl/history/DefaultHistory.java` - `matchP
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-5q95-hrpc-m3w3 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.