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Fedora 28: FEDORA-2018-3e021c6c2e Critical: Libgit2 Out-of-Bounds Threat

fedora
Calendar Grey August 9, 2018
Dist Fedora Esm H88
Address potential buffer overflows in libgit2 for Fedora 28 to enhance security measures. Make sure to upgrade your system now.
This is a security release fixing out-of-bounds reads when processing smart- protocol "ng" packets

Summary

libgit2 is a portable, pure C implementation of the Git core methods

provided as a re-entrant linkable library with a solid API, allowing

you to write native speed custom Git applications in any language

with bindings.

This is a security release fixing out-of-bounds reads when processing smart-protocol "ng" packets. When parsing an "ng" packet, we keep track of both the

current position as well as the remaining length of the packet itself. But

instead of taking care not to exceed the length, we pass the current pointer's

position to strchr, which will search for a certain character until hitting NUL.

It is thus possible to create a crafted packet which doesn't contain a NUL byte

to trigger an out-of-bounds read. The issue was discovered by the oss-fuzz

project, issue 9406.

* Tue Aug 7 2018 Pete Walter - 0.26.6-1

- Update to 0.26.6

* Tue Jul 10 2018 Pete Walter - 0.26.5-1

- Update to 0.26.5 (CVE-2018-10887, CVE-2018-10888)

* Mon Jun 25 2018 Pete Walter - 0.26.4-1

- Update to 0.26.4 (CVE-2018-11235)

su -c 'dnf upgrade --advisory FEDORA-2018-3e021c6c2e' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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Change Log

References

Update Instructions

Severity
critical
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Product: Fedora 28
Version: 0.26.6
Release: 1.fc28
Summary: C implementation of the Git core methods as a library with a solid API

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