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 (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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | oauth2 | < 1.9rc1 | 1.9rc1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2013-4347
- https://github.com/simplegeo/python-oauth2/issues/9
- https://github.com/simplegeo/python-oauth2/pull/146
- https://github.com/joestump/python-oauth2/commit/82dd2cdd4954cd7b8983d5d64c0dfd9072bf4650
- https://access.redhat.com/errata/RHSA-2015:1591
- https://access.redhat.com/errata/RHSA-2015:1592
- https://access.redhat.com/security/cve/CVE-2013-4347
- https://bugzilla.redhat.com/show_bug.cgi?id=1007758
- https://github.com/joestump/python-oauth2
- https://github.com/pypa/advisory-database/tree/main/vulns/oauth2/PYSEC-2014-86.yaml
- http://www.openwall.com/lists/oss-security/2013/09/12/7
- http://www.securityfocus.com/bid/62388
- https://github.com/advisories/GHSA-rv8h-p43r-4x5r
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-330- Platform
- Python (PyPI)
- Package
oauth2- Disclosed
- 20.05.2014
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-rv8h-p43r-4x5r - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2014-86 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: oauth2
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 05.2014 05.2014
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
earlier: 2
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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 this entry
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