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Bug 628162 (CVE-2017-12880) - <dev-python/pyjwt-1.5.2: Incorrect handling of PEM-encoded public keys
Summary: <dev-python/pyjwt-1.5.2: Incorrect handling of PEM-encoded public keys
Status: RESOLVED FIXED
Alias: CVE-2017-12880
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
URL: https://bugzilla.redhat.com/show_bug....
Whiteboard: B3 [noglsa cve]
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-18 10:28 UTC by Agostino Sarubbo
Modified: 2017-09-04 19:04 UTC (History)
1 user (show)

See Also:
Package list:
=dev-python/pyjwt-1.5.2
Runtime testing required: No
stable-bot: sanity-check+

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Description Agostino Sarubbo gentoo-dev 2017-08-18 10:28:03 UTC 
From ${URL} :

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.

Upstream bug:

https://github.com/jpadilla/pyjwt/pull/277


@maintainer(s): since the fixed package is already in the tree, please let us know if it is ready for the stabilization or not.
Comment 1 Aaron Bauman (RETIRED) gentoo-dev 2017-09-04 19:04:17 UTC 
am64/x86 stable

GLSA Vote: No