1. CVE-Search
  2. CVE-2017-11424
ID CVE-2017-11424
Summary In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
References
Vulnerable Configurations
  • cpe:2.3:a:pyjwt_project:pyjwt:0.1.6:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.1.6:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.1.9:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.1.9:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:0.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:0.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:pyjwt_project:pyjwt:1.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:pyjwt_project:pyjwt:1.5.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVSS
Base: 5.0 (as of 03-10-2019 - 00:03)
Impact:
Exploitability:
CWE NVD-CWE-noinfo
CAPEC
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE PARTIAL NONE
cvss-vector via4 AV:N/AC:L/Au:N/C:N/I:P/A:N
refmap via4
confirm https://github.com/jpadilla/pyjwt/pull/277
debian DSA-3979
Last major update 03-10-2019 - 00:03
Published 24-08-2017 - 16:29
Last modified 03-10-2019 - 00:03
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