The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2352-1 advisory.

    Simon McVittie discovered that DBus incorrectly handled the file descriptors message limit. A local     attacker could use this issue to cause DBus to crash, resulting in a denial of service, or possibly     execute arbitrary code. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-3635)

    Alban Crequy discovered that DBus incorrectly handled a large number of file descriptor messages. A local     attacker could use this issue to cause DBus to stop responding, resulting in a denial of service. This     issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-3636)

    Alban Crequy discovered that DBus incorrectly handled certain file descriptor messages. A local attacker     could use this issue to cause DBus to maintain persistent connections, possibly resulting in a denial of     service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-3637)

    Alban Crequy discovered that DBus incorrectly handled a large number of parallel connections and parallel     message calls. A local attacker could use this issue to cause DBus to consume resources, possibly     resulting in a denial of service. (CVE-2014-3638)

    Alban Crequy discovered that DBus incorrectly handled incomplete connections. A local attacker could use     this issue to cause DBus to fail legitimate connection attempts, resulting in a denial of service.
    (CVE-2014-3639)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

Update to 1.6.28

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.

The remote NewStart CGSL host, running version MAIN 6.02, has dbus packages installed that are affected by multiple vulnerabilities:

  - Unspecified vulnerability in the match_rule_equal function in bus/signals.c in D-Bus before 1.0.2 allows     local applications to remove match rules for other applications and cause a denial of service (lost     process messages). (CVE-2006-6107)

  - dbus-daemon in D-Bus before 1.0.3, and 1.1.x before 1.1.20, recognizes send_interface attributes in allow     directives in the security policy only for fully qualified method calls, which allows local users to     bypass intended access restrictions via a method call with a NULL interface. (CVE-2008-0595)

  - The _dbus_validate_signature_with_reason function (dbus-marshal-validate.c) in D-Bus (aka DBus) before     1.2.14 uses incorrect logic to validate a basic type, which allows remote attackers to spoof a signature     via a crafted key. NOTE: this is due to an incorrect fix for CVE-2008-3834. (CVE-2009-1189)

  - libdbus 1.5.x and earlier, when used in setuid or other privileged programs in X.org and possibly other     products, allows local users to gain privileges and execute arbitrary code via the DBUS_SYSTEM_BUS_ADDRESS     environment variable. NOTE: libdbus maintainers state that this is a vulnerability in the applications     that do not cleanse environment variables, not in libdbus itself: we do not support use of libdbus in     setuid binaries that do not sanitize their environment before their first call into libdbus.
    (CVE-2012-3524)

  - The _dbus_printf_string_upper_bound function in dbus/dbus-sysdeps-unix.c in D-Bus (aka DBus) 1.4.x before     1.4.26, 1.6.x before 1.6.12, and 1.7.x before 1.7.4 allows local users to cause a denial of service     (service crash) via a crafted message. (CVE-2013-2168)

  - The dbus-daemon in D-Bus 1.2.x through 1.4.x, 1.6.x before 1.6.20, and 1.8.x before 1.8.4, sends an     AccessDenied error to the service instead of a client when the client is prohibited from accessing the     service, which allows local users to cause a denial of service (initialization failure and exit) or     possibly conduct a side-channel attack via a D-Bus message to an inactive service. (CVE-2014-3477)

  - dbus 1.3.0 before 1.6.22 and 1.8.x before 1.8.6 allows local users to cause a denial of service     (disconnect) via a certain sequence of crafted messages that cause the dbus-daemon to forward a message     containing an invalid file descriptor. (CVE-2014-3533)

  - Off-by-one error in D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8, when running on a     64-bit system and the max_message_unix_fds limit is set to an odd number, allows local users to cause a     denial of service (dbus-daemon crash) or possibly execute arbitrary code by sending one more file     descriptor than the limit, which triggers a heap-based buffer overflow or an assertion failure.
    (CVE-2014-3635)

  - D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8 allows local users to (1) cause a denial of     service (prevention of new connections and connection drop) by queuing the maximum number of file     descriptors or (2) cause a denial of service (disconnect) via multiple messages that combine to have more     than the allowed number of file descriptors for a single sendmsg call. (CVE-2014-3636)

  - D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8 does not properly close connections for     processes that have terminated, which allows local users to cause a denial of service via a D-bus message     containing a D-Bus connection file descriptor. (CVE-2014-3637)

  - The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8     allows local users to cause a denial of service (CPU consumption) via a large number of method calls.
    (CVE-2014-3638)

  - The dbus-daemon in D-Bus before 1.6.24 and 1.8.x before 1.8.8 does not properly close old connections,     which allows local users to cause a denial of service (incomplete connection consumption and prevention of     new connections) via a large number of incomplete connections. (CVE-2014-3639)

  - D-Bus 1.3.0 through 1.6.x before 1.6.26, 1.8.x before 1.8.10, and 1.9.x before 1.9.2 allows local users to     cause a denial of service (prevention of new connections and connection drop) by queuing the maximum     number of file descriptors. NOTE: this vulnerability exists because of an incomplete fix for     CVE-2014-3636.1. (CVE-2014-7824)

  - D-Bus 1.4.x through 1.6.x before 1.6.30, 1.8.x before 1.8.16, and 1.9.x before 1.9.10 does not validate     the source of ActivationFailure signals, which allows local users to cause a denial of service (activation     failure error returned) by leveraging a race condition involving sending an ActivationFailure signal     before systemd responds. (CVE-2015-0245)

  - An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-     daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local     attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use     this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus     clients. (CVE-2020-12049)

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

The remote NewStart CGSL host, running version MAIN 6.06, has dbus packages installed that are affected by multiple vulnerabilities:

  - dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical     Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of     symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only     affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own     home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to     read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a     cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent     client connection came from an attacker-chosen uid, allowing authentication bypass. (CVE-2019-12749)

  - libdbus 1.5.x and earlier, when used in setuid or other privileged programs in X.org and possibly other     products, allows local users to gain privileges and execute arbitrary code via the DBUS_SYSTEM_BUS_ADDRESS     environment variable. NOTE: libdbus maintainers state that this is a vulnerability in the applications     that do not cleanse environment variables, not in libdbus itself: we do not support use of libdbus in     setuid binaries that do not sanitize their environment before their first call into libdbus.
    (CVE-2012-3524)

  - Unspecified vulnerability in the match_rule_equal function in bus/signals.c in D-Bus before 1.0.2 allows     local applications to remove match rules for other applications and cause a denial of service (lost     process messages). (CVE-2006-6107)

  - dbus-daemon in D-Bus before 1.0.3, and 1.1.x before 1.1.20, recognizes send_interface attributes in allow     directives in the security policy only for fully qualified method calls, which allows local users to     bypass intended access restrictions via a method call with a NULL interface. (CVE-2008-0595)

  - The _dbus_validate_signature_with_reason function (dbus-marshal-validate.c) in D-Bus (aka DBus) before     1.2.14 uses incorrect logic to validate a basic type, which allows remote attackers to spoof a signature     via a crafted key. NOTE: this is due to an incorrect fix for CVE-2008-3834. (CVE-2009-1189)

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

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - 在 64 位系统上运行并且 max_message_unix_fds 限制设置为奇数时，D-Bus 1.3.0 到 1.6.x 之前的 1.6.24 和 之前的 1.8.x1.8.8中的差一错误允许本地用户造成拒绝服务（dbus-daemon 崩溃）或可能执行任意代码，方法是发送比限制多出的文件描述符，从而触发基于堆的缓冲区溢出或断言失败。
    (CVE-2014-3635)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

Alban Crequy 和 Simon McVittie 发现了 D-Bus 消息后台程序中的多个漏洞。

- CVE-2014-3635 在 64 位平台上，文件描述符传递可被本地用户滥用于造成 dbus-daemon 中的堆损坏，从而导致崩溃或者可能导致任意代码执行。

- CVE-2014-3636 dbus-daemon 中的拒绝服务漏洞允许本地攻击者通过耗尽描述符限制来阻止与 dbus-daemon 建立新连接或者断开现有客户端的连接。

- CVE-2014-3637 恶意本地用户可创建与 dbus-daemon 的 D-Bus 连接，可通过终止参与的进程来终止这些连接，从而导致拒绝服务漏洞。

- CVE-2014-3638 dbus-daemon 受到用于跟踪哪些消息预期收到回复的代码中的拒绝服务漏洞的影响，从而允许本地攻击者降低 dbus-daemon 的性能。

- CVE-2014-3639 dbus-daemon 未正确拒绝来自本地用户的恶意连接，从而导致拒绝服务漏洞。

远程 Ubuntu 14.04 LTS 主机上安装的多个程序包受到 USN-2352-1 公告中提及的多个漏洞影响。

    Simon McVittie 发现 DBus 未正确处理文件描述符消息限制。本地攻击者可利用此问题使 DBus 崩溃，从而导致拒绝服务或者可能执行任意代码。此问题仅影响 Ubuntu 12.04 LTS 和 Ubuntu 14.04 LTS。(CVE-2014-3635)

    Alban Crequy 发现 DBus 未正确处理大量文件描述符消息。本地攻击者可利用此问题造成 DBus 停止响应，从而导致拒绝服务。此问题仅影响 Ubuntu 12.04 LTS 和 Ubuntu 14.04 LTS。(CVE-2014-3636)

    Alban Crequy 发现 DBus 未正确处理某些文件描述符消息。本地攻击者可利用此问题使 DBus 保持永久连接，从而可能导致拒绝服务。此问题仅影响 Ubuntu 12.04 LTS 和 Ubuntu 14.04 LTS。(CVE-2014-3637)

    Alban Crequy 发现 DBus 未正确处理大量并行连接和并行消息调用。本地攻击者可利用此问题使 DBus 消耗资源，从而可能导致拒绝服务。(CVE-2014-3638)

    Alban Crequy 发现 DBus 未正确处理不完整的连接。本地攻击者可利用此问题使 DBus 拒绝合法的连接尝试，从而导致拒绝服务。
    (CVE-2014-3639)

Tenable 已直接从 Ubuntu 安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

Simon McVittie 报告：

不接受 cmsg 消息的填充中的额外 fd，这样可导致 4 字节堆缓冲区溢出 (CVE-2014-3635)。

将每条消息传递的最大 Unix 文件描述符的默认值从 1024 减少到 16，从而防止具有默认最大连接数的 uid 在 Linux 的默认 rlimit 下耗尽系统总线的文件描述符 (CVE-2014-3636)。

在新的可配置限制 pending_fd_timeout（默认值为 150 秒）之后断开仍具有待解组 fd 的连接，从而消除创建滥用的连接的可能性，无法通过设置对连接的文件描述符的循环引用来断开这些连接 (CVE-2014-3637)。

将每个连接的最大待定回复的默认值从 8192 减少到 128，从而缓解算法复杂性拒绝服务攻击 (CVE-2014-3638)。

将系统总线上认证超时的默认值从 30 秒降低为 5 秒，从而避免因为耗尽所有未经认证的连接槽而导致拒绝服务，当所有未经认证的连接槽用尽时，制作新的连接尝试块，而不是断开连接 (CVE-2014-3639)。

更新到 1.6.28

请注意，Tenable Network Security 已直接从 Fedora 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下尽可能进行了自动整理和排版。

ID	Name	Product	Family	Published	Updated	Severity
77809	Ubuntu 14.04 LTS : DBus vulnerabilities (USN-2352-1)	Nessus	Ubuntu Local Security Checks	9/23/2014	8/27/2024	medium
80130	Fedora 19 : dbus-1.6.28-1.fc19 (2014-16227)	Nessus	Fedora Local Security Checks	12/22/2014	1/11/2021	medium
167488	NewStart CGSL MAIN 6.02 : dbus Multiple Vulnerabilities (NS-SA-2022-0093)	Nessus	NewStart CGSL Local Security Checks	11/15/2022	11/16/2022	medium
266270	NewStart CGSL MAIN 6.06 : dbus Multiple Vulnerabilities (NS-SA-2025-0231)	Nessus	NewStart CGSL Local Security Checks	9/30/2025	9/30/2025	high
218212	Linux Distros 未修补的漏洞: CVE-2014-3635	Nessus	Misc.	3/4/2025	3/4/2025	medium
77716	Debian DSA-3026-1：dbus - 安全更新	Nessus	Debian Local Security Checks	9/17/2014	1/11/2021	medium
77809	Ubuntu 14.04 LTS：DBus 漏洞 (USN-2352-1)	Nessus	Ubuntu Local Security Checks	9/23/2014	8/27/2024	medium
77733	FreeBSD：dbus -- 多种漏洞 (38242d51-3e58-11e4-ac2f-bcaec565249c)	Nessus	FreeBSD Local Security Checks	9/18/2014	1/6/2021	medium
80130	Fedora 19：dbus-1.6.28-1.fc19 (2014-16227)	Nessus	Fedora Local Security Checks	12/22/2014	1/11/2021	medium

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