Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS02OWNoLXcybTItM3ZqcM4AAvV0

golang.org/x/text/language Denial of service via crafted Accept-Language header

The BCP 47 tag parser has quadratic time complexity due to inherent aspects of its design. Since the parser is, by design, exposed to untrusted user input, this can be leveraged to force a program to consume significant time parsing Accept-Language headers. The parser cannot be easily rewritten to fix this behavior for various reasons. Instead the solution implemented in this CL is to limit the total complexity of tags passed into ParseAcceptLanguage by limiting the number of dashes in the string to 1000. This should be more than enough for the majority of real world use cases, where the number of tags being sent is likely to be in the single digits.

Specific Go Packages Affected

golang.org/x/text/language

Permalink: https://github.com/advisories/GHSA-69ch-w2m2-3vjp
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS02OWNoLXcybTItM3ZqcM4AAvV0
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: about 2 years ago
Updated: about 1 year ago

CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Percentage: 0.00239
EPSS Percentile: 0.62517

Identifiers: GHSA-69ch-w2m2-3vjp, CVE-2022-32149
References:

• https://nvd.nist.gov/vuln/detail/CVE-2022-32149
• https://go.dev/cl/442235
• https://go.dev/issue/56152
• https://groups.google.com/g/golang-announce/c/-hjNw559_tE/m/KlGTfid5CAAJ
• https://pkg.go.dev/vuln/GO-2022-1059
• https://github.com/golang/go/issues/56152
• https://github.com/golang/text/commit/434eadcdbc3b0256971992e8c70027278364c72c
• https://github.com/advisories/GHSA-69ch-w2m2-3vjp

Repository: https://github.com/golang/go
Blast Radius: 40.9

Affected Packages