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Gentoo Linux Security Advisory GLSA 201708-05 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: RAR and UnRAR: User-assisted execution of arbitrary code |
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Date: August 21, 2017 |
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Bugs: #622342, #622382 |
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ID: 201708-05 |
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Synopsis |
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======== |
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|
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An integer overflow in RAR and UnRAR might allow remote attackers to |
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execute arbitrary code. |
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|
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Background |
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========== |
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|
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RAR and UnRAR provide command line interfaces for compressing and |
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decompressing RAR files. |
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|
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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/rar < 5.5.0_beta4_p20170628>= 5.5.0_beta4_p20170628 |
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2 app-arch/unrar < 5.5.5 >= 5.5.5 |
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------------------------------------------------------------------- |
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2 affected packages |
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|
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Description |
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=========== |
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|
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A VMSF_DELTA memory corruption was discovered in which an integer |
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overflow can be caused in DataSize+CurChannel. The result is a negative |
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value of the "DestPos" variable which allows writing out of bounds when |
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setting Mem[DestPos]. |
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|
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Impact |
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====== |
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|
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A remote attacker, by enticing a user to open a specially crafted |
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archive, could execute arbitrary code with the privileges of the |
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process. |
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|
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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 RAR users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot -v ">=app-arch/rar-5.5.0_beta4_p20170628" |
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All UnRAR users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-arch/unrar-5.5.5" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2012-6706 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-6706 |
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|
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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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https://security.gentoo.org/glsa/201708-05 |
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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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https://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2017 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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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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