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Gentoo Linux Security Advisory GLSA 200609-13 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: gzip: Multiple vulnerabilities |
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Date: September 23, 2006 |
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Bugs: #145511 |
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ID: 200609-13 |
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Synopsis |
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======== |
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|
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gzip is affected by multiple vulnerabilities, including buffer |
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overflows and infinite loops, possibly allowing the execution of |
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arbitrary code. |
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Background |
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========== |
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|
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gzip, the GNU zip compression utility, is a free and patent |
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unencumbered replacement for the standard compress utility. |
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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 app-arch/gzip < 1.3.5-r9 >= 1.3.5-r9 |
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Description |
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=========== |
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|
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Tavis Ormandy of the Google Security Team has reported multiple |
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vulnerabilities in gzip. A stack buffer modification vulnerability was |
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discovered in the LZH decompression code, where a pathological data |
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stream may result in the modification of stack data such as frame |
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pointer, return address or saved registers. A static buffer underflow |
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was discovered in the pack decompression support, allowing a specially |
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crafted pack archive to underflow a .bss buffer. A static buffer |
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overflow was uncovered in the LZH decompression code, allowing a data |
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stream consisting of pathological huffman codes to overflow a .bss |
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buffer. Multiple infinite loops were also uncovered in the LZH |
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decompression code. |
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|
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Impact |
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====== |
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|
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A remote attacker may create a specially crafted gzip archive, which |
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when decompressed by a user or automated system exectues arbitrary code |
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with the privileges of the user id invoking gzip. The infinite loops |
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may be abused by an attacker to disrupt any automated systems invoking |
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gzip to handle data decompression. |
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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 gzip users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-arch/gzip-1.3.5-r9" |
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|
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References |
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========== |
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[ 1 ] CVE-2006-4334 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4334 |
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[ 2 ] CVE-2006-4335 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4335 |
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[ 3 ] CVE-2006-4336 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4336 |
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[ 4 ] CVE-2006-4337 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4337 |
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[ 5 ] CVE-2006-4338 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4338 |
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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-200609-13.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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