USN-104-1: unshar vulnerability

Posted by Philipp Esselbach on: 04/04/2005 07:05 AM [ Print | 0 comment(s) ]

An unshar security update has been released for Ubuntu Linux

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Ubuntu Security Notice USN-104-1 April 04, 2005
sharutils vulnerability
https://bugzilla.ubuntu.com/show_bug.cgi?id=8459
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A security issue affects the following Ubuntu releases:

Ubuntu 4.10 (Warty Warthog)

The following packages are affected:

sharutils

The problem can be corrected by upgrading the affected package to version 1:4.2.1-10ubuntu0.2. In general, a standard system upgrade is sufficient to effect the necessary changes.

Details follow:

Joey Hess discovered that "unshar" created temporary files in an insecure manner. This could allow a symbolic link attack to create or overwrite arbitrary files with the privileges of the user invoking the program.

Source archives:

http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils_4.2.1-10ubuntu0.2.diff.gz
Size/MD5: 8181 7135804300d9a381cfebc2133e7239c2
http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils_4.2.1-10ubuntu0.2.dsc
Size/MD5: 634 1a16efd9010325d369909b608fb59597
http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils_4.2.1.orig.tar.gz
Size/MD5: 306022 b8ba1d409f07edcb335ff72a27bd9828

Architecture independent packages:

http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils-doc_4.2.1-10ubuntu0.2_all.deb
Size/MD5: 28000 56cd083b2fbc3e689cb157a59c760f52

amd64 architecture (Athlon64, Opteron, EM64T Xeon)

http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils_4.2.1-10ubuntu0.2_amd64.deb
Size/MD5: 113908 801afa19d2f272d22f7d13f5efb0a51a

i386 architecture (x86 compatible Intel/AMD)

http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils_4.2.1-10ubuntu0.2_i386.deb
Size/MD5: 110766 2d3e74efceff274a2bb4a17b3c4702b1

powerpc architecture (Apple Macintosh G3/G4/G5)

http://security.ubuntu.com/ubuntu/pool/main/s/sharutils/sharutils_4.2.1-10ubuntu0.2_powerpc.deb
Size/MD5: 112656 1ce41914dde0c8d548f6bcc2d3a8fbd8