Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dbus | 1.2.14-1 | — |
| Debian 13 | dbus | 1.2.14-1 | — |
| Debian 12 | dbus | 1.2.14-1 | — |
| Debian 5.0 | dbus | 1.2.1-5+lenny1 | DSA-1837-1 |
| Debian 4.0 | dbus | 1.0.2-1+etch3 | DSA-1837-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | dbus +3 | 1.1.2-12.el5_4.1 | RHSA-2010:0018 |
Advisories 2
- RHSA-2010:0018 Red Hat Security Advisory: dbus security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1837-1 dbus - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20090416 CVE-2009-1189: invalid fix for CVE-2008-3834 (dbus) mailing-list
- dbus-dbusmarshalvalidate-spoofing(50385) vdb-entry
- http://bugs.freedesktop.org/show_bug.cgi?id=17803
- 31602 vdb-entry
- 38794 third-party-advisory
- [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates mailing-list
- USN-799-1 vendor-advisory
- 35810 third-party-advisory
- http://www.freedesktop.org/wiki/Software/dbus#head-dad0dab297a44f1d7a3b1259cfc06b583fd6a88a
- oval:org.mitre.oval:def:10308 vdb-entry signature
- RHSA-2010:0095 vendor-advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- 32127 third-party-advisory
- ADV-2010-0528 vdb-entry