USN-5355-2: zlib vulnerability

Published Mar 30, 2022
·
Updated

USN-5355-1 fixed a vulnerability in zlib. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: Danilo Ramos discovered that zlib incorrectly handled memory when performing certain deflating operations. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code.

Affected Software

16 affected componentsFixes available
All of the following
ubuntu/lib64z1<1:1.2.8.dfsg-2ubuntu4.3+esm1
1:1.2.8.dfsg-2ubuntu4.3+esm1
Ubuntu Ubuntu=16.04
All of the following
ubuntu/libx32z1<1:1.2.8.dfsg-2ubuntu4.3+esm1
1:1.2.8.dfsg-2ubuntu4.3+esm1
Ubuntu Ubuntu=16.04
All of the following
ubuntu/lib32z1<1:1.2.8.dfsg-2ubuntu4.3+esm1
1:1.2.8.dfsg-2ubuntu4.3+esm1
Ubuntu Ubuntu=16.04
All of the following
ubuntu/zlib1g<1:1.2.8.dfsg-2ubuntu4.3+esm1
1:1.2.8.dfsg-2ubuntu4.3+esm1
Ubuntu Ubuntu=16.04
All of the following
ubuntu/lib64z1<1:1.2.8.dfsg-1ubuntu1.1+esm1
1:1.2.8.dfsg-1ubuntu1.1+esm1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/libx32z1<1:1.2.8.dfsg-1ubuntu1.1+esm1
1:1.2.8.dfsg-1ubuntu1.1+esm1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/lib32z1<1:1.2.8.dfsg-1ubuntu1.1+esm1
1:1.2.8.dfsg-1ubuntu1.1+esm1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/zlib1g<1:1.2.8.dfsg-1ubuntu1.1+esm1
1:1.2.8.dfsg-1ubuntu1.1+esm1
Ubuntu Ubuntu=14.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/lib64z1 to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-2ubuntu4.3+esm1
  2. Upgrade

    Upgrade ubuntu/libx32z1 to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-2ubuntu4.3+esm1
  3. Upgrade

    Upgrade ubuntu/lib32z1 to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-2ubuntu4.3+esm1
  4. Upgrade

    Upgrade ubuntu/zlib1g to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-2ubuntu4.3+esm1
  5. Upgrade

    Upgrade ubuntu/lib64z1 to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-1ubuntu1.1+esm1
  6. Upgrade

    Upgrade ubuntu/libx32z1 to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-1ubuntu1.1+esm1
  7. Upgrade

    Upgrade ubuntu/lib32z1 to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-1ubuntu1.1+esm1
  8. Upgrade

    Upgrade ubuntu/zlib1g to a version that resolves this vulnerability.

    Fixed in 1:1.2.8.dfsg-1ubuntu1.1+esm1
  9. Upgrade

    Upgrade zlib to a version that resolves this vulnerability.

    Patch USN-5355-1
  10. Upgrade

    Upgrade zlib to a version that resolves this vulnerability.

    Patch USN-5355-2

Event History

Mar 30, 2022
Advisory Published
via Ubuntu·12:00 AM

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of USN-5355-2?

The severity of USN-5355-2 is categorized as high due to the potential for an attacker to execute arbitrary code.

2

How do I fix USN-5355-2?

To fix USN-5355-2, update the affected zlib packages to the recommended versions provided in the advisory.

3

Which versions of Ubuntu are affected by USN-5355-2?

USN-5355-2 affects Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

4

What are the symptoms of the vulnerability identified in USN-5355-2?

The symptoms may include application crashes or unexpected behavior when using zlib for data compression.

5

Who discovered the vulnerability fixed in USN-5355-2?

The vulnerability fixed in USN-5355-2 was discovered by Danilo Ramos.

Company

Resources

Contact

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