GMS-2020-701: Denial of Service in uap-core when processing crafted User-Agent strings

March 10, 2020

Impact

Some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings.

Patches

Please update uap-ruby to >= v2.6.0

For more information

https://github.com/ua-parser/uap-core/security/advisories/GHSA-cmcx-xhr8-3w9p

Reported in uap-core by Ben Caller @bcaller

References

github.com/advisories/GHSA-pcqq-5962-hvcw
github.com/ua-parser/uap-ruby/commit/2bb18268f4c5ba7d4ba0e21c296bf6437063da3a
github.com/ua-parser/uap-ruby/security/advisories/GHSA-pcqq-5962-hvcw

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