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Ubuntu 23.10: USN-6678-1 Critical: libgit2 Denial Of Service and More

ubuntu
Calendar Grey March 5, 2024
Dist Ubuntu Esm H88
Numerous vulnerabilities found in libgit2 impact various Ubuntu releases, prompting immediate updates for users.
Several security issues were fixed in libgit2.

Summary

Several security issues were fixed in libgit2.

Software Description:

- libgit2: Portable C implementation of the Git core methods library

Details:

It was discovered that libgit2 mishandled equivalent filenames on NTFS

partitions. If a user or automated system were tricked into cloning a

specially crafted repository, an attacker could possibly use this issue to

execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and

Ubuntu 18.04 LTS. (CVE-2020-12278, CVE-2020-12279)

It was discovered that libgit2 did not perform certificate checking by

default. An attacker could possibly use this issue to perform a

machine-in-the-middle attack. This issue only affected Ubuntu 16.04 LTS,

Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2023-22742)

It was discovered that libgit2 could be made to run into an infinite loop.

An attacker could possibly use this issue to cause a denial of service.

This issue only affected Ubuntu 23.10. (CVE-2024-24575)

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical arbitrary code libgit2 ubuntu 23.10

Update Instructions

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

Ubuntu 23.10:
   libgit2-1.5                     1.5.1+ds-1ubuntu1.1

Ubuntu 22.04 LTS:
   libgit2-1.1                     1.1.0+dfsg.1-4.1ubuntu0.1

Ubuntu 20.04 LTS:
   libgit2-28                      0.28.4+dfsg.1-2ubuntu0.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libgit2-26                      0.26.0+dfsg.1-1.1ubuntu0.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libgit2-24                      0.24.1-2ubuntu0.2+esm2

In general, a standard system update will make all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-6678-1

  CVE-2020-12278, CVE-2020-12279, CVE-2023-22742, CVE-2024-24575,

  CVE-2024-24577

Severity
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Ubuntu Security Notice USN-6678-1

Topics%20covered

Topics Covered

security advisory denial of service critical arbitrary code libgit2 ubuntu 23.10

Package Information

  https://launchpad.net/ubuntu/+source/libgit2/1.5.1+ds-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libgit2/0.28.4+dfsg.1-2ubuntu0.1

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