Thomas de Grenier de Latour discovered that the checkrestart tool in the debian-goodies suite of utilities, allowed local users to gain privileges via shell metacharacters in the name of the executable file for a running process.
For the old stable distribution (sarge), this problem has been fixed in version 0.24+sarge1.
For the stable distribution (etch), this problem has been fixed in version 0.27+etch1.
For the unstable distribution (sid), this problem has been fixed in version 0.34.
We recommend that you upgrade your debian-goodies package.
MD5 checksums of the listed files are available in the original advisory.