Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with large table size
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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- netty-codec-http2
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