[SECURITY] [DLA 1495-1] git-annex security update

Package : git-annex
Version : 5.20141125+oops-1+deb8u2
CVE ID : CVE-2017-12976 CVE-2018-10857 CVE-2018-10859
Debian Bug : 873088

The git-annex package was found to have multiple vulnerabilities when
operating on untrusted data that could lead to arbitrary command
execution and encrypted data exfiltration.

CVE-2017-12976

git-annex before 6.20170818 allows remote attackers to execute
arbitrary commands via an ssh URL with an initial dash character
in the hostname, as demonstrated by an ssh://-eProxyCommand= URL,
a related issue to CVE-2017-9800, CVE-2017-12836,
CVE-2017-1000116, and CVE-2017-1000117.

CVE-2018-10857

git-annex is vulnerable to a private data exposure and
exfiltration attack. It could expose the content of files located
outside the git-annex repository, or content from a private web
server on localhost or the LAN.

CVE-2018-10859

git-annex is vulnerable to an Information Exposure when decrypting
files. A malicious server for a special remote could trick
git-annex into decrypting a file that was encrypted to the user's
gpg key. This attack could be used to expose encrypted data that
was never stored in git-annex

For Debian 8 "Jessie", these problems have been fixed in version
5.20141125+oops-1+deb8u2.

We recommend that you upgrade your git-annex packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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