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Ubuntu 14.10: 2461-3 Critical Vulnerability in PyYAML Denial of Service

ubuntu
Calendar Grey January 12, 2015
Dist Ubuntu Esm H88
Ubuntu Security Alert USN-2461-3 explores a PyYAML flaw affecting users, delivering critical patches.
Applications using PyYAML could be made to crash if they received specially crafted input.

Summary

Applications using PyYAML could be made to crash if they received

specially crafted input.

Software Description:

- pyyaml: YAML parser and emitter for Python

Details:

Stanisław Pitucha and Jonathan Gray discovered that PyYAML did not

properly handle wrapped strings. An attacker could create specially

crafted YAML data to trigger an assert, causing a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical software update ubuntu pyyaml

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.10:
  python-yaml                     3.11-1ubuntu0.1
  python3-yaml                    3.11-1ubuntu0.1

Ubuntu 14.04 LTS:
  python-yaml                     3.10-4ubuntu0.1
  python3-yaml                    3.10-4ubuntu0.1

Ubuntu 12.04 LTS:
  python-yaml                     3.10-2ubuntu0.1
  python3-yaml                    3.10-2ubuntu0.1

After a standard system update you need to restart applications using
PyYAML to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2461-3

CVE-2014-9130

Severity
critical
Lowest
Low
Medium
High
Critical

January 12, 2015

Topics%20covered

Topics Covered

security advisory denial of service critical software update ubuntu pyyaml

Package Information

https://launchpad.net/ubuntu/+source/pyyaml/3.11-1ubuntu0.1
https://launchpad.net/ubuntu/+source/pyyaml/3.10-4ubuntu0.1
https://launchpad.net/ubuntu/+source/pyyaml/3.10-2ubuntu0.1

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