このアドバイザリは、安定版（stable）amd64 ディストリビューションのセキュリティサポートを追加します。
sarge リリース以降のすべてのセキュリティ更新がカバーされます。これには、まだ正式ではない amd64 ポートに対する更新済みパッケージがありませんでした。今後のセキュリティアドバイザリには、このポートの更新も含まれる予定です。

Marcin Slusarz discovered two integer overflow vulnerabilities in libgadu, a library provided and used by ekg, a console Gadu Gadu client, an instant messaging program, that could lead to the execution of arbitrary code.

The library is also used by other packages such as kopete, which should be restarted to take effect of this update.

此公告會新增對穩定之 amd64 發行版本的安全性支援。
其中包含自 sarge 發佈以來的所有安全性更新，但缺少非官方 amd64 連接埠的更新版套件。之後的安全性公告也將包含此連接埠的更新。

此公告添加了对稳定 amd64 发行版本的安全支持。
它涵盖自 sarge 发布以来的所有安全更新，该版本缺少针对尚不是官方 amd64 端口的更新后的程序包。未来的安全公告将也包含此端口的更新。

The remote host is affected by the vulnerability described in GLSA-200507-23 (Kopete: Vulnerability in included Gadu library)

    Kopete contains an internal copy of libgadu and is therefore     subject to several input validation vulnerabilities in libgadu.
  Impact :

    A remote attacker could exploit this vulnerability to execute     arbitrary code or crash Kopete.
  Workaround :

    Delete all Gadu Gadu contacts.

Updated kdenetwork packages to correct a security flaw in Kopete are now available for Red Hat Enterprise Linux 4.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

The kdenetwork package contains networking applications for the K Desktop Environment. Kopete is a KDE instant messenger which supports a number of protocols including ICQ, MSN, Yahoo, Jabber, and Gadu-Gadu.

Multiple integer overflow flaws were found in the way Kopete processes Gadu-Gadu messages. A remote attacker could send a specially crafted Gadu-Gadu message which would cause Kopete to crash or possibly execute arbitrary code. The Common Vulnerabilities and Exposures project assigned the name CVE-2005-1852 to this issue.

In order to be affected by this issue, a user would need to have registered with Gadu-Gadu and be signed in to the Gadu-Gadu server in order to receive a malicious message. In addition, Red Hat believes that the Exec-shield technology (enabled by default in Red Hat Enterprise Linux 4) would block attempts to remotely exploit this vulnerability.

Note that this issue does not affect Red Hat Enterprise Linux 2.1 or 3.

Users of Kopete should update to these packages which contain a patch to correct this issue.

The remote Redhat Enterprise Linux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2005:639 advisory.

  - security flaw (CVE-2005-1852, CVE-2005-2369, CVE-2005-2370, CVE-2005-2448)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Multiple integer overflow flaws were found in the way Kopete processes Gadu-Gadu messages. A remote attacker could send a specially crafted Gadu-Gadu message which would cause Kopete to crash or possibly execute arbitrary code. The Common Vulnerabilities and Exposures project assigned the name CVE-2005-1852 to this issue.

Users of Kopete should update to these packages which contain a patch to correct this issue.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Wojtek Kaniewski reports :

Multiple vulnerabilities have been found in libgadu, a library for handling Gadu-Gadu instant messaging protocol. It is a part of ekg, a Gadu-Gadu client, but is widely used in other clients. Also some of the user contributed scripts were found to behave in an insecure manner.

- integer overflow in libgadu (CVE-2005-1852) that could be triggered by an incomming message and lead to application crash and/or remote code execution

- insecure file creation (CVE-2005-1850) and shell command injection (CVE-2005-1851) in other user contributed scripts (discovered by Marcin Owsiany and Wojtek Kaniewski)

- several signedness errors in libgadu that could be triggered by an incomming network data or an application passing invalid user input to the library

- memory alignment errors in libgadu that could be triggered by an incomming message and lead to bus errors on architectures like SPARC

- endianness errors in libgadu that could cause invalid behaviour of applications on big-endian architectures

The remote host is affected by the vulnerability described in GLSA-200507-26 (GNU Gadu, CenterICQ, Kadu, EKG, libgadu: Remote code execution in Gadu library)

    GNU Gadu, CenterICQ, Kadu, EKG and libgadu are vulnerable to an integer     overflow.
  Impact :

    A remote attacker could exploit the integer overflow to execute     arbitrary code or cause a Denial of Service.
  Workaround :

    There is no known workaround at this time.

This advisory adds security support for the stable amd64 distribution.
It covers all security updates since the release of sarge, which were missing updated packages for the not yet official amd64 port. Future security advisories will include updates for this port as well.

Marcin Owsiany and Wojtek Kaniewski discovered that some contributed scripts (contrib/ekgh, contrib/ekgnv.sh, and contrib/getekg.sh) in the ekg package created temporary files in an insecure way, which allowed exploitation of a race condition to create or overwrite files with the privileges of the user invoking the script. (CAN-2005-1850)

Marcin Owsiany and Wojtek Kaniewski discovered a shell command injection vulnerability in a contributed utility (contrib/scripts/ekgbot-pre1.py). By sending specially crafted content to the bot, an attacker could exploit this to execute arbitrary code with the privileges of the user running ekgbot. (CAN-2005-1851)

Marcin Slusarz discovered an integer overflow in the Gadu library. By sending a specially crafted incoming message, a remote attacker could execute arbitrary code with the privileges of the application using libgadu. (CAN-2005-1852)

Eric Romang discovered that another contributed script (contrib/scripts/linki.py) created temporary files in an insecure way, which allowed exploitation of a race condition to create or overwrite files with the privileges of the user invoking the script.
(CAN-2005-1916)

Grzegorz Jaskiewicz discovered several integer overflows in the Gadu library. A remote attacker could exploit this to crash the Gadu client application or even execute arbitrary code with the privileges of the user by sending specially crafted messages. (CAN-2005-2369)

Szymon Zygmunt and Michal Bartoszkiewicz discovered a memory alignment error in the Gadu library. By sending specially crafted messages, a remote attacker could crash the application using the library. (CAN-2005-2370)

Marcin Slusarz discovered that the Gadu library did not properly handle endianess conversion in some cases. This caused invalid behavior on big endian architectures. The only affected supported architecture is powerpc. (CAN-2005-2448).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
57528	Debian DSA-773-1：amd64 - いくつかの脆弱性	Nessus	Debian Local Security Checks	2012/1/12	2021/1/4	critical
19316	Debian DSA-767-1 : ekg - integer overflows	Nessus	Debian Local Security Checks	2005/7/31	2021/1/4	high
57528	Debian DSA-773-1 : amd64 - 數個弱點	Nessus	Debian Local Security Checks	2012/1/12	2021/1/4	critical
57528	Debian DSA-773-1：amd64 - 多个漏洞	Nessus	Debian Local Security Checks	2012/1/12	2021/1/4	critical
19325	GLSA-200507-23 : Kopete: Vulnerability in included Gadu library	Nessus	Gentoo Local Security Checks	2005/7/31	2021/1/6	high
21954	CentOS 4 : kdenetwork (CESA-2005:639)	Nessus	CentOS Local Security Checks	2006/7/5	2021/1/4	high
19286	RHEL 4 : kdenetwork (RHSA-2005:639)	Nessus	Red Hat Local Security Checks	2005/7/22	2024/4/27	high
19291	Fedora Core 3 : kdenetwork-3.3.1-3.2 (2005-623)	Nessus	Fedora Local Security Checks	2005/7/24	2021/1/11	high
19292	Fedora Core 4 : kdenetwork-3.4.1-0.fc4.2 (2005-624)	Nessus	Fedora Local Security Checks	2005/7/24	2021/1/11	high
21414	FreeBSD : libgadu -- multiple vulnerabilities (3b4a6982-0b24-11da-bc08-0001020eed82)	Nessus	FreeBSD Local Security Checks	2006/5/13	2021/1/6	critical
19328	GLSA-200507-26 : GNU Gadu, CenterICQ, Kadu, EKG, libgadu: Remote code execution in Gadu library	Nessus	Gentoo Local Security Checks	2005/7/31	2021/1/6	high
57528	Debian DSA-773-1 : amd64 - several vulnerabilities	Nessus	Debian Local Security Checks	2012/1/12	2021/1/4	critical
20568	Ubuntu 5.04 : ekg vulnerabilities (USN-162-1)	Nessus	Ubuntu Local Security Checks	2006/1/15	2021/1/19	critical

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