Advisory Published

USN-1527-1: Expat vulnerabilities

First published: Fri Aug 10 2012(Updated: )

It was discovered that Expat computed hash values without restricting the ability to trigger hash collisions predictably. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service by consuming excessive CPU resources. (CVE-2012-0876) Tim Boddy discovered that Expat did not properly handle memory reallocation when processing XML files. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service by consuming excessive memory resources. This issue only affected Ubuntu 8.04 LTS, 10.04 LTS, 11.04 and 11.10. (CVE-2012-1148)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/lib64expat1<2.0.1-0ubuntu1.2
2.0.1-0ubuntu1.2
Ubuntu Ubuntu=8.04
All of
ubuntu/libexpat1-udeb<2.0.1-0ubuntu1.2
2.0.1-0ubuntu1.2
Ubuntu Ubuntu=8.04
All of
ubuntu/libexpat1<2.0.1-0ubuntu1.2
2.0.1-0ubuntu1.2
Ubuntu Ubuntu=8.04
All of
ubuntu/lib64expat1<2.0.1-7.2ubuntu1.1
2.0.1-7.2ubuntu1.1
Ubuntu Ubuntu=12.04
All of
ubuntu/libexpat1-udeb<2.0.1-7.2ubuntu1.1
2.0.1-7.2ubuntu1.1
Ubuntu Ubuntu=12.04
All of
ubuntu/libexpat1<2.0.1-7.2ubuntu1.1
2.0.1-7.2ubuntu1.1
Ubuntu Ubuntu=12.04
All of
ubuntu/lib64expat1<2.0.1-7ubuntu3.11.10.1
2.0.1-7ubuntu3.11.10.1
Ubuntu Ubuntu=11.10
All of
ubuntu/libexpat1-udeb<2.0.1-7ubuntu3.11.10.1
2.0.1-7ubuntu3.11.10.1
Ubuntu Ubuntu=11.10
All of
ubuntu/libexpat1<2.0.1-7ubuntu3.11.10.1
2.0.1-7ubuntu3.11.10.1
Ubuntu Ubuntu=11.10
All of
ubuntu/lib64expat1<2.0.1-7ubuntu3.11.04.1
2.0.1-7ubuntu3.11.04.1
Ubuntu Ubuntu=11.04
All of
ubuntu/libexpat1-udeb<2.0.1-7ubuntu3.11.04.1
2.0.1-7ubuntu3.11.04.1
Ubuntu Ubuntu=11.04
All of
ubuntu/libexpat1<2.0.1-7ubuntu3.11.04.1
2.0.1-7ubuntu3.11.04.1
Ubuntu Ubuntu=11.04
All of
ubuntu/lib64expat1<2.0.1-7ubuntu1.1
2.0.1-7ubuntu1.1
Ubuntu Ubuntu=10.04
All of
ubuntu/libexpat1-udeb<2.0.1-7ubuntu1.1
2.0.1-7ubuntu1.1
Ubuntu Ubuntu=10.04
All of
ubuntu/libexpat1<2.0.1-7ubuntu1.1
2.0.1-7ubuntu1.1
Ubuntu Ubuntu=10.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-1527-1?

    The severity of USN-1527-1 is moderate.

  • How do I fix the Expat vulnerabilities in Ubuntu 8.04?

    To fix the Expat vulnerabilities in Ubuntu 8.04, update the lib64expat1 package to version 2.0.1-0ubuntu1.2 or above.

  • How do I fix the Expat vulnerabilities in Ubuntu 12.04?

    To fix the Expat vulnerabilities in Ubuntu 12.04, update the libexpat1 package to version 2.0.1-7.2ubuntu1.1 or above.

  • How do I fix the Expat vulnerabilities in Ubuntu 11.10?

    To fix the Expat vulnerabilities in Ubuntu 11.10, update the lib64expat1 package to version 2.0.1-7ubuntu3.11.10.1 or above.

  • How do I fix the Expat vulnerabilities in Ubuntu 11.04?

    To fix the Expat vulnerabilities in Ubuntu 11.04, update the lib64expat1 package to version 2.0.1-7ubuntu3.11.04.1 or above.

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