| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| <glsa id="201511-01"> |
| <title>MirBSD Korn Shell: Arbitrary code execution</title> |
| <synopsis>An attacker who already had access to the environment could so |
| append values to parameters passed through programs. |
| </synopsis> |
| <product type="ebuild"></product> |
| <announced>November 02, 2015</announced> |
| <revised>November 02, 2015: 2</revised> |
| <bug>524414</bug> |
| <access>local</access> |
| <affected> |
| <package name="app-shells/mksh" auto="yes" arch="*"> |
| <unaffected range="ge">50c</unaffected> |
| <vulnerable range="lt">50c</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p>MirBSD Korn Shell is an actively developed free implementation of the |
| Korn Shell programming language and a successor to the Public Domain Korn |
| Shell. |
| </p> |
| </background> |
| <description> |
| <p>Improper sanitation of environment import allows for appending of values |
| to passed parameters. |
| </p> |
| </description> |
| <impact type="normal"> |
| <p>An attacker who already had access to the environment could so append |
| values to parameters passed through programs (including sudo(8) or |
| setuid) to shell scripts, including indirectly, after those programs |
| intended to sanitise the environment, e.g. invalidating the last $PATH |
| component. |
| </p> |
| </impact> |
| <workaround> |
| <p>There is no known workaround at this time.</p> |
| </workaround> |
| <resolution> |
| <p>All mksh users should upgrade to the latest version:</p> |
| |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=app-shells/mksh-50c" |
| </code> |
| |
| </resolution> |
| <references> |
| <uri link="https://www.mirbsd.org/permalinks/wlog-10_e20141003-tg.htm#e20141003-tg_wlog-10"> |
| mksh R50c released, security fix |
| </uri> |
| </references> |
| <metadata tag="requester" timestamp="Fri, 12 Dec 2014 08:13:43 +0000">K_F</metadata> |
| <metadata tag="submitter" timestamp="Mon, 02 Nov 2015 15:33:07 +0000">mrueg</metadata> |
| </glsa> |