Source: jline3 Version: 3.3.1-5 Severity: important Tags: security upstream Forwarded: https://github.com/jline/jline3/pull/2000 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]> Control: found -1 3.3.1-4
Hi, The following vulnerabilities were published for jline3. CVE-2026-56740[0]: | JLine is a Java library for handling console input. Prior to | 3.30.14, 4.0.16, and 4.2.1, the JLine3 Telnet server remote-telnet | module does not limit the number of environment variables a client | may inject via the Telnet NEW-ENVIRON option, and | TelnetIO.readNEVariables() in TelnetIO.java:1127-1180 stores each | variable pair in a HashMap held by ConnectionData, allowing an | unauthenticated attacker to flood unique variable pairs before the | terminating IAC SE byte and exhaust JVM heap memory with an | OutOfMemoryError. This issue is fixed in versions 3.30.14, 4.0.16, | and 4.2.1. CVE-2026-56741[1]: | JLine is a Java library for handling console input. Prior to | 3.30.14, 4.0.16, and 4.2.1, the JLine3 Telnet server remote-telnet | module does not apply an upper bound to terminal dimensions received | via the Telnet NAWS option, and TelnetIO.handleNAWS() in | TelnetIO.java:856-879 reads client-supplied width and height as | 16-bit unsigned integers and passes values such as 65535x65535 to | setTerminalGeometry(), allowing an unauthenticated remote attacker | to repeatedly alternate values and trigger continuous expensive | rendering work that causes CPU exhaustion and denial of service. | This issue is fixed in versions 3.30.14, 4.0.16, and 4.2.1. If you fix the vulnerabilities please also make sure to include the CVE (Common Vulnerabilities & Exposures) ids in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-56740 https://www.cve.org/CVERecord?id=CVE-2026-56740 https://github.com/jline/jline3/security/advisories/GHSA-47qp-hqvx-6r3f [1] https://security-tracker.debian.org/tracker/CVE-2026-56741 https://www.cve.org/CVERecord?id=CVE-2026-56741 https://github.com/jline/jline3/security/advisories/GHSA-2r2c-cx56-8933 [2] https://github.com/jline/jline3/pull/2000 Regards, Salvatore
