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Fencer Intel
critical —

GHSA-32gv-6cf3-wcmq json

HTTP/2 DoS Attacks: Ping, Reset, and Settings Floods

published 4y ago modified last yr.

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### Impact Twisted web servers that utilize the optional HTTP/2 support suffer from the following flow-control related vulnerabilities:

Ping flood: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9512 Reset flood: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9514 Settings flood: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9515

A Twisted web server supports HTTP/2 requests if you've installed the [`http2` optional dependency set](https://twistedmatrix.com/documents/19.2.0/installation/howto/optional.html).

### Workarounds There are no workarounds.

### References https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md

### For more information If you have any questions or comments about this advisory: * Open an issue in [Twisted's Trac](https://twistedmatrix.com/trac/)

Patch / fix

  • pypi twisted 19.10.0

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Affected packages

ecosystem package affected fixed in
pypi twisted
<19.10.0
19.10.0

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of twisted/twisted published their own advisory on GitHub. Reviewed sources take precedence over it.