Alban Crequy and Simon McVittie discovered several vulnerabilities in the D-Bus message daemon.

  - CVE-2014-3635     On 64-bit platforms, file descriptor passing could be     abused by local users to cause heap corruption in     dbus-daemon, leading to a crash, or potentially to     arbitrary code execution.

  - CVE-2014-3636     A denial-of-service vulnerability in dbus-daemon allowed     local attackers to prevent new connections to     dbus-daemon, or disconnect existing clients, by     exhausting descriptor limits.

  - CVE-2014-3637     Malicious local users could create D-Bus connections to     dbus-daemon which could not be terminated by killing the     participating processes, resulting in a     denial-of-service vulnerability.

  - CVE-2014-3638     dbus-daemon suffered from a denial-of-service     vulnerability in the code which tracks which messages     expect a reply, allowing local attackers to reduce the     performance of dbus-daemon.

  - CVE-2014-3639     dbus-daemon did not properly reject malicious     connections from local users, resulting in a     denial-of-service vulnerability.

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。

  - D-Bus 1.3.0 至 1.6.x 之前的 1.6.24 和 1.8.x 之前的 1.8.8 未正确关闭已终止进程的连接，这允许本地用户通过包含 D-Bus 漏洞的 D-bus 消息造成拒绝服务。连接文件描述符相关的缺陷。 (CVE-2014-3637)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

远程主机受到 GLSA-201412-12 中所述漏洞的影响（D-Bus：多个漏洞）

    已在 D-Bus 中发现多个漏洞。请检查下方引用的 CVE 标识符以了解详细信息。
  影响：

    本地攻击者可能造成拒绝服务。
  变通方案：

    目前无任何已知的变通方案。

更新到 1.8.12 (#1168438)

- 修复 CVE-2014-3635 (fd.o#83622)

- 修复 CVE-2014-3636 (fd.o#82820)

- 修复 CVE-2014-3637 (fd.o#80559)

- 修复 CVE-2014-3638 (fd.o#81053)

- 修复 CVE-2014-3639 (fd.o#80919)

- 修复 CVE-2014-7824 (fd.o#85105)

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。

DBUS-1 服务和库已更新到新上游版本 1.6.24，修复了多个安全问题和缺陷。

dbus 1.6.8 以来的上游变更

+ 安全补丁

- 在 cmsg 消息的填充中不接受额外的 fd，否则可能造成 4 字节堆缓冲区溢出。（CVE-2014-3635、fdo#83622；Simon McVittie）

- 将每条消息通过的默认最大 Unix 文件描述符数量从 1024 降低为 16，防止含有默认最大连接数的 uid 耗尽 Linux 的默认 rlimit 下的系统总线的文件描述符。具有更严格 fd 限制的分销商或系统管理员可能希望进一步减少这些限制。此外，在 Linux 上，这将防止二次拒绝服务，否则可能导致 dbus-daemon 超过每个 sendmsg() 的最大 fd 数，并断开将接收这些 fd 的进程。（CVE-2014-3636、fdo#82820；Alban Crequy）

- 在新的可配置限制 pending_fd_timeout（默认为 150 秒）之后，断开的连接仍然具有 fd 待定解组，从而防止通过对连接的文件描述符设置循环引用来创建无法断开的恶意连接。
 （CVE-2014-3637、fdo#80559；Alban Crequy）

- 将每个连接的默认最大待定回复数量从 8192 降低为 128，从而降低拒绝服务攻击的算法复杂性（CVE-2014-3638、fdo#81053；Alban Crequy）

- 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、fdo#80919；Alban Crequy）

- On Linux >= 2.6.37-rc4，如果 sendmsg() 执行 ETOOMANYREFS 失败，则静默终止该消息。这样会防止恶意客户端中的攻击通过创建 dbus-daemon 来断开与系统服务的连接（即本地拒绝服务）。（fdo#80163、CVE-2014-3532；Alban Crequy）

- 连续多个消息中包含 fd 时，跟踪剩余的 Unix 文件描述符。
 这样会防止恶意客户端可使 dbus-daemon 断开与系统服务连接的另一个攻击。
 （fdo#79694、fdo#80469、CVE-2014-3533；Alejandro Martínez Suárez、Simon McVittie、Alban Crequy）

- Collabora Ltd. 的 Alban Crequy 发现并修复了 dbus-daemon（D-Bus 的引用实现的一部分）中的拒绝服务缺陷。此外，在高度异常的环境中，同一缺陷可导致在不应进行通信的进程之间出现边信道。（CVE-2014-3477，fdo#78979）

- CVE-2013-2168：为系统服务修复可用作拒绝服务的 va_list 滥用。
 Alexandru Cornea 报告的漏洞。(Simon)

+ 其他补丁

- 在列出可激活的服务或活动服务时，不在内存不足时泄漏内存（fdo#71526，Radoslaw Pajak）

- 修复回归测试中的不明行为（fdo#69924，DreamNik）

- 匹配规则中的 path_namespace='/' 错误地不匹配任何项；现在匹配所有项。（fdo#70799，Simon McVittie）

- 让 dbus_connection_set_route_peer_messages(x, FALSE) 的行为与记录的一致。以前，它假设其第二个参数是 TRUE。（fdo#69165，Chengwei Yang）

- 修复不太可能的错误路径中的空指针取消引用（fdo#69327，Sviatoslav Chagaev）

- 如果 accept4() 因 EINVAL 发生故障（在采用较高版本 glibc 的较低版本 Linux 内核中就可能发生故障），则尝试 accept() 而不是进入忙循环。（fdo#69026，Chengwei Yang）

- 如果 socket() 或 socketpair() 因 EINVAL 或 EPROTOTYPE（例如在含有新的 glibc 的 Hurd 或较早版本的 Linux 上）发生故障，则尝试不使用 SOCK_CLOEXEC。（fdo#69073；Pino Toscano、Chengwei Yang）

- 修复错误代码路径中的文件描述符泄漏。
 （fdo#69182，Sviatoslav Chagaev）

- writev() 不可用时修复编译（fdo#69409，Vasiliy Balyasnyy）

- 避免信号中断 waitpid() 时无限忙循环（fdo#68945，Simon McVittie）

- 正确转义包含非 ASCII 字符的地址（fdo#53499，Chengwei Yang）

- 如果 malloc() 在 _dbus_string_init() 或类似函数中返回 NULL，并且在之后释放字符串，不释放无效指针（fdo#65959，Chengwei Yang）

- 如果 malloc() 在 dbus_set_error() 中返回 NULL，不为从不曾 va_start() 的 va_list 执行 va_end()（fdo#66300，Chengwei Yang）

- 修复严格对齐平台上的回归测试（fdo#67279，Colin Walters）

- 避免调用函数参数“interface”，因为某些 Windows 标头拥有该名称的命名空间污染宏（fdo#66493，Ivan Romanov）

- 使“make -j check”工作（fdo#68852，Simon McVittie）

- 在 dbus-daemon 中，如果 .service 文件开头为 key=value 则不会崩溃（fdo#60853，Chengwei Yang）

- 修复 systemd 连接到总线之前尝试激活 systemd 服务导致的断言失败（fdo#50199，Chengwei Yang）

- 避免忽略 write() 返回的编译器警告 (Chengwei Yang)

- UTF-8 字符串中再次允许使用以下 Unicode 勘误表 #9、非字符 U+nFFFE、U+nFFFF、U+FDD0..U+FDEF。（fdo#63072，Simon McVittie）

- 通过负插槽（即分配插槽之前）诊断 dbus_connection_get_data() 的不正确使用而非返回垃圾（fdo#63127，Dan Williams）

- 在激活帮助程序中，当编译测试时，不重置系统总线地址，从而修复回归测试。（fdo#52202，Simon）

- 修复 Valgrind 3.8 构建，代价是造成在某些编译器中 Valgrind 3.6 发出无害的警告（fdo#55932，Arun Raghavan）

- 不泄漏指向 /dev/null 的临时 fds（fdo#56927，Michel HERMIER）

- 在 CMake 下创建 session.d、system.d 目录（fdo#41319，Ralf Habacker）

- 包括 alloca.h 用于 alloca()（如果可用），修复对 Solaris 10 的编译（fdo#63071，Dagobert Michelsen）

ID	名前	製品	ファミリー	公開日	更新日	深刻度
77716	Debian DSA-3026-1 : dbus - security update	Nessus	Debian Local Security Checks	2014/9/17	2021/1/11	medium
77809	Ubuntu 14.04 LTS : DBus vulnerabilities (USN-2352-1)	Nessus	Ubuntu Local Security Checks	2014/9/23	2024/8/27	medium
80130	Fedora 19 : dbus-1.6.28-1.fc19 (2014-16227)	Nessus	Fedora Local Security Checks	2014/12/22	2021/1/11	medium
167488	NewStart CGSL MAIN 6.02 : dbus Multiple Vulnerabilities (NS-SA-2022-0093)	Nessus	NewStart CGSL Local Security Checks	2022/11/15	2022/11/16	medium
266270	NewStart CGSL MAIN 6.06 : dbus Multiple Vulnerabilities (NS-SA-2025-0231)	Nessus	NewStart CGSL Local Security Checks	2025/9/30	2025/9/30	high
218355	Linux Distros 未修补的漏洞: CVE-2014-3637	Nessus	Misc.	2025/3/4	2025/9/4	high
79965	GLSA-201412-12 : D-Bus：多个漏洞	Nessus	Gentoo Local Security Checks	2014/12/15	2021/1/6	medium
80060	Fedora 21：dbus-1.8.12-1.fc21 (2014-16147)	Nessus	Fedora Local Security Checks	2014/12/17	2021/1/11	medium
77890	openSUSE 安全更新：dbus-1 (openSUSE-SU-2014:1239-1)	Nessus	SuSE Local Security Checks	2014/9/26	2021/1/19	medium

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