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Gentoo Linux Security Advisory GLSA 200706-05 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: ClamAV: Multiple Denials of Service |
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Date: June 15, 2007 |
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Bugs: #178082 |
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ID: 200706-05 |
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Synopsis |
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======== |
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|
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ClamAV contains several vulnerabilities leading to a Denial of Service. |
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Background |
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========== |
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|
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ClamAV is a GPL virus scanner. |
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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-antivirus/clamav < 0.90.3 >= 0.90.3 |
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Description |
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=========== |
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|
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Several vulnerabilities were discovered in ClamAV by various |
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researchers: |
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|
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* Victor Stinner (INL) discovered that the OLE2 parser may enter in |
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an infinite loop (CVE-2007-2650). |
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|
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* A boundary error was also reported by an anonymous researcher in |
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the file unsp.c, which might lead to a buffer overflow |
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(CVE-2007-3023). |
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|
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* The file unrar.c contains a heap-based buffer overflow via a |
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modified vm_codesize value from a RAR file (CVE-2007-3123). |
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|
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* The RAR parsing engine can be bypassed via a RAR file with a header |
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flag value of 10 (CVE-2007-3122). |
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|
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* The cli_gentempstream() function from clamdscan creates temporary |
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files with insecure permissions (CVE-2007-3024). |
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|
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Impact |
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====== |
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|
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A remote attacker could send a specially crafted file to the scanner, |
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possibly triggering one of the vulnerabilities. The two buffer |
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overflows are reported to only cause Denial of Service. This would lead |
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to a Denial of Service by CPU consumption or a crash of the scanner. |
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The insecure temporary file creation vulnerability could be used by a |
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local user to access sensitive data. |
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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 ClamAV users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.90.3" |
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References |
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========== |
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[ 1 ] CVE-2007-2650 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2650 |
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[ 2 ] CVE-2007-3023 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3023 |
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[ 3 ] CVE-2007-3024 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3024 |
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[ 4 ] CVE-2007-3122 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3122 |
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[ 5 ] CVE-2007-3123 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3123 |
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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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http://security.gentoo.org/glsa/glsa-200706-05.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 2007 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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