id: GO-2021-0159
modules:
    - module: std
      versions:
        - fixed: 1.4.3
      vulnerable_at: 1.4.2
      packages:
        - package: net/http
          symbols:
            - CanonicalMIMEHeaderKey
            - body.readLocked
            - canonicalMIMEHeaderKey
            - chunkWriter.writeHeader
            - fixLength
            - fixTransferEncoding
            - readTransfer
            - transferWriter.shouldSendContentLength
            - validHeaderFieldByte
          skip_fix: 'TODO: revisit this reason (fix appears to not work with Go <1.18)'
summary: Request smuggling due to improper header parsing in net/http
description: |-
    HTTP headers were not properly parsed, which allows remote attackers to conduct
    HTTP request smuggling attacks via a request that contains Content-Length and
    Transfer-Encoding header fields.
published: 2022-01-05T21:39:14Z
cves:
    - CVE-2015-5739
    - CVE-2015-5740
    - CVE-2015-5741
credits:
    - Jed Denlea
    - Régis Leroy
references:
    - fix: https://go.dev/cl/13148
    - fix: https://go.googlesource.com/go/+/26049f6f9171d1190f3bbe05ec304845cfe6399f
    - fix: https://go.dev/cl/11772
    - fix: https://go.dev/cl/11810
    - fix: https://go.dev/cl/12865
    - fix: https://go.googlesource.com/go/+/117ddcb83d7f42d6aa72241240af99ded81118e9
    - fix: https://go.googlesource.com/go/+/300d9a21583e7cf0149a778a0611e76ff7c6680f
    - fix: https://go.googlesource.com/go/+/c2db5f4ccc61ba7df96a747e268a277b802cbb87
    - report: https://go.dev/issue/12027
    - report: https://go.dev/issue/11930
    - web: https://groups.google.com/g/golang-announce/c/iSIyW4lM4hY/m/ADuQR4DiDwAJ