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Gentoo Linux Security Advisory GLSA 200403-06 |
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http://security.gentoo.org |
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Severity: Normal |
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Title: Multiple remote buffer overflow vulnerabilities in Courier |
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Date: March 26, 2004 |
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Bugs: #45584 |
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ID: 200403-06 |
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Synopsis |
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======== |
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|
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Remote buffer overflow vulnerabilites have been found in Courier-IMAP |
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and Courier MTA. These exploits may allow the execution of abritrary |
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code, allowing unauthorized access to a vulnerable system. |
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Background |
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========== |
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|
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Courier MTA is a multiprotocol mail server suite that provides webmail, |
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mailing lists, IMAP, and POP3 services. Courier-IMAP is a standalone |
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server that gives IMAP access to local mailboxes. |
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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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net-mail/courier-imap < 3.0.0 >= 3.0.0 |
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net-mail/courier < 0.45 >= 0.45 |
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Description |
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=========== |
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|
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The vulnerabilities have been found in the 'SHIFT_JIS' converter in |
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'shiftjis.c' and 'ISO2022JP' converter in 'so2022jp.c'. An attacker may |
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supply Unicode characters that exceed BMP (Basic Multilingual Plane) |
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range, causing an overflow. |
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Impact |
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====== |
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An attacker without privileges may exploit this vulnerability remotely, |
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allowing arbitrary code to be executed in order to gain unauthorized |
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access. |
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Workaround |
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========== |
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While a workaround is not currently known for this issue, all users are |
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advised to upgrade to the latest version of the affected packages. |
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Resolution |
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========== |
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All users should upgrade to the current version of the affected |
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packages: |
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# emerge sync |
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# emerge -pv ">=net-mail/courier-imap-3.0.0" |
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# emerge ">=net-mail/courier-imap-3.0.0" |
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# ** Or; depending on your installation... ** |
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# emerge -pv ">=net-mail/courier-0.45" |
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# emerge ">=net-mail/courier-0.45" |
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|
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References |
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========== |
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[ 1 ] http://www.securityfocus.com/bid/9845 |
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[ 2 ] http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0224 |
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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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