Netty Bzip2Decoder: Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| netty | netty | affected |
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No data available yet.
| Source | ID | Title |
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Github GHSA |
GHSA-558v-64gr-wgg4 | Netty: [Bzip2Decoder] Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang |
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.460% probability within 30 days)
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ssvc
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| Description | A flaw was found in the netty-codec-compression component of Netty. This vulnerability, caused by a logic error in the bzip2 decoder, allows a remote attacker to send specially crafted bzip2-compressed data. Processing this malformed data can trigger an infinite loop, causing the decoder thread to consume excessive CPU resources. This leads to a denial of service (DoS), requiring manual intervention to restore service. | Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the `Bzip2Decoder` handler in Netty's compression codec pipeline is vulnerable to a denial-of-service attack through a malformed bzip2 stream that permanently captures the event-loop thread in an infinite loop. The vulnerability exists in the run-length encoding (RLE) state machine within [`Bzip2BlockDecompressor.read()`]. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final. |
| Title | io.netty/netty-codec-compression: Netty: Infinite loop in netty-codec-compression (bzip2) | Netty Bzip2Decoder: Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang |
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cvssV4_0
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| Type | Values Removed | Values Added |
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| Description | A flaw was found in the netty-codec-compression component of Netty. This vulnerability, caused by a logic error in the bzip2 decoder, allows a remote attacker to send specially crafted bzip2-compressed data. Processing this malformed data can trigger an infinite loop, causing the decoder thread to consume excessive CPU resources. This leads to a denial of service (DoS), requiring manual intervention to restore service. | |
| Title | io.netty/netty-codec-compression: Netty: Infinite loop in netty-codec-compression (bzip2) | |
| Weaknesses | CWE-835 | |
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threat_severity
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cvssV3_1
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