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Debian Security Advisory 3440-1

Debian Security Advisory 3440-1
Posted Jan 11, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3440-1 - When sudo is configured to allow a user to edit files under a directory that they can already write to without using sudo, they can actually edit (read and write) arbitrary files. Daniel Svartman reported that a configuration like this might be introduced unintentionally if the editable files are specified using wildcards, for example.

tags | advisory, arbitrary
systems | linux, debian
advisories | CVE-2015-5602
SHA-256 | b7fd5c1572210ca6ee5a1990251b1e0e570a22591356acc8311a24238db62710

Debian Security Advisory 3440-1

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-3440-1 security@debian.org
https://www.debian.org/security/ Ben Hutchings
January 11, 2016 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : sudo
CVE ID : CVE-2015-5602
Debian Bug : 804149

When sudo is configured to allow a user to edit files under a directory
that they can already write to without using sudo, they can actually
edit (read and write) arbitrary files. Daniel Svartman reported that a
configuration like this might be introduced unintentionally if the
editable files are specified using wildcards, for example:

operator ALL=(root) sudoedit /home/*/*/test.txt

The default behaviour of sudo has been changed so that it does not allow
editing of a file in a directory that the user can write to, or that is
reached by following a symlink in a directory that the user can write
to. These restrictions can be disabled, but this is strongly
discouraged.

For the oldstable distribution (wheezy), this problem has been fixed
in version 1.8.5p2-1+nmu3+deb7u1.

For the stable distribution (jessie), this problem has been fixed in
version 1.8.10p3-1+deb8u3.

For the testing distribution (stretch), this problem has been fixed
in version 1.8.15-1.1.

For the unstable distribution (sid), this problem has been fixed in
version 1.8.15-1.1.

We recommend that you upgrade your sudo packages.

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

Mailing list: debian-security-announce@lists.debian.org
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