Medium: python-oauth2

Issue Overview:

The Server.verify_request function in SimpleGeo python-oauth2 does not check the nonce, which allows remote attackers to perform replay attacks via a signed URL.

The (1) make_nonce, (2) generate_nonce, and (3) generate_verifier functions in SimpleGeo python-oauth2 uses weak random numbers to generate nonces, which makes it easier for remote attackers to guess the nonce via a brute force attack.

Affected Packages:

python-oauth2

Issue Correction:
Run yum update python-oauth2 to update your system.

New Packages:

noarch:  
    python-oauth2-1.5.211-7.1.amzn1.noarch  
  
src:  
    python-oauth2-1.5.211-7.1.amzn1.src  

Additional References

Red Hat: CVE-2013-4346, CVE-2013-4347

Mitre: CVE-2013-4346, CVE-2013-4347