1.6.28 への更新

注意：Tenable Network Security は、前述の記述ブロックを Fedora セキュリティアドバイザリから直接抽出しています。Tenable では、できる限り新たな問題を持ち込まないように、自動的に整理して書式設定するようにしています。

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.

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.

Simon McVittie reports :

Do not accept an extra fd in the padding of a cmsg message, which could lead to a 4-byte heap buffer overrun (CVE-2014-3635).

Reduce default for maximum Unix file descriptors passed per message from 1024 to 16, preventing a uid with the default maximum number of connections from exhausting the system bus' file descriptors under Linux's default rlimit (CVE-2014-3636).

Disconnect connections that still have a fd pending unmarshalling after a new configurable limit, pending_fd_timeout (defaulting to 150 seconds), removing the possibility of creating an abusive connection that cannot be disconnected by setting up a circular reference to a connection's file descriptor (CVE-2014-3637).

Reduce default for maximum pending replies per connection from 8192 to 128, mitigating an algorithmic complexity denial-of-service attack (CVE-2014-3638).

Reduce default for authentication timeout on the system bus from 30 seconds to 5 seconds, avoiding denial of service by using up all unauthenticated connection slots; and when all unauthenticated connection slots are used up, make new connection attempts block instead of disconnecting them (CVE-2014-3639).

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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

Note that Nessus relies on the presence of the package as reported by the vendor.

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
79924	Fedora 20 : dbus-1.6.28-1.fc20 (2014-16243)	Nessus	Fedora Local Security Checks	2014/12/15	2021/1/11	medium
77845	openSUSE セキュリティ更新：dbus-1（openSUSE-SU-2014:1228-1）	Nessus	SuSE Local Security Checks	2014/9/25	2021/1/19	medium
77809	Ubuntu 14.04 LTS : DBus vulnerabilities (USN-2352-1)	Nessus	Ubuntu Local Security Checks	2014/9/23	2024/8/27	medium
77716	Debian DSA-3026-1 : dbus - security update	Nessus	Debian Local Security Checks	2014/9/17	2021/1/11	medium
77733	FreeBSD : dbus -- multiple vulnerabilities (38242d51-3e58-11e4-ac2f-bcaec565249c)	Nessus	FreeBSD Local Security Checks	2014/9/18	2021/1/6	medium
80130	Fedora 19 : dbus-1.6.28-1.fc19 (2014-16227)	Nessus	Fedora Local Security Checks	2014/12/22	2021/1/11	medium
218212	Linux Distros Unpatched Vulnerability : CVE-2014-3635	Nessus	Misc.	2025/3/4	2025/3/4	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

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