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CVE-2011-1521

UnknownEPSS 4.27%

Last modified

CVE-2011-1521 is a vulnerability of currently unknown severity. The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service (resource consumption) via a crafted URL, as demonstrated by the file:///etc/passwd and file:///dev/zero URLs.. EPSS estimates a 4.27% chance of exploitation in the next 30 days.

Description

The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service (resource consumption) via a crafted URL, as demonstrated by the file:///etc/passwd and file:///dev/zero URLs.

Metrics

EPSS Probability
4.27%

89.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
PythonPython2.0
PythonPython2.0.1
PythonPython2.1
PythonPython2.1.1
PythonPython2.1.2
PythonPython2.1.3
PythonPython2.2
PythonPython2.2.1
PythonPython2.2.2
PythonPython2.2.3
PythonPython2.3.1
PythonPython2.3.2
PythonPython2.3.3
PythonPython2.3.4
PythonPython2.3.5
PythonPython2.3.7
PythonPython2.4.1
PythonPython2.4.2
PythonPython2.4.3
PythonPython2.4.4
PythonPython2.4.6
PythonPython2.5.1
PythonPython2.5.2
PythonPython2.5.3
PythonPython2.5.4
PythonPython2.6.1
PythonPython2.6.4
PythonPython2.6.5
PythonPython2.6.6
PythonPython2.6.7
PythonPython2.7.1
PythonPython3.0
PythonPython3.0.1
PythonPython3.1
PythonPython3.1.1
PythonPython3.1.2
PythonPython3.1.3
PythonPython3.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-1521?
The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service (resource consumption) via a crafted URL, as demonstrated by the file:///etc/passwd and file:///dev/zero URLs.
How severe is CVE-2011-1521?
Severity scoring for CVE-2011-1521 is pending analysis. The EPSS model estimates a 4.27% probability of exploitation in the next 30 days.
How do I fix CVE-2011-1521?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST