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Gentoo Linux Security Advisory GLSA 200606-25 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Hashcash: Possible heap overflow |
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Date: June 26, 2006 |
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Bugs: #134960 |
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ID: 200606-25 |
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Synopsis |
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======== |
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|
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A heap overflow vulnerability in the Hashcash utility could allow an |
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attacker to execute arbitrary code. |
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Background |
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========== |
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Hashcash is a utility for generating Hashcash tokens, a proof-of-work |
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system to reduce the impact of spam. |
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/hashcash < 1.21 >= 1.21 |
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|
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Description |
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=========== |
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|
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Andreas Seltenreich has reported a possible heap overflow in the |
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array_push() function in hashcash.c, as a result of an incorrect amount |
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of allocated memory for the "ARRAY" structure. |
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|
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Impact |
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====== |
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By sending malicious entries to the Hashcash utility, an attacker may |
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be able to cause an overflow, potentially resulting in the execution of |
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arbitrary code with the privileges of the user running the application. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Hashcash users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/hashcash-1.21" |
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References |
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========== |
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[ 1 ] Hashcash ChangeLog |
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http://www.hashcash.org/source/CHANGELOG |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200606-25.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2006 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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