- Issued:
- 2003-12-10
- Updated:
- 2004-01-16
RHSA-2003:386 - Security Advisory
Synopsis
freeradius security update
Type/Severity
Security Advisory: Moderate
Topic
Updated FreeRADIUS packages are now available that fix a denial of service
vulnerability.
Description
FreeRADIUS is an Internet authentication daemon, which implements the
RADIUS protocol. It allows Network Access Servers (NAS boxes) to perform
authentication for dial-up users.
The rad_decode function in FreeRADIUS 0.9.2 and earlier allows remote
attackers to cause a denial of service (crash) via a short RADIUS string
attribute with a tag, which causes memcpy to be called with a -1 length
argument, as demonstrated using the Tunnel-Password attribute. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2003-0967 to this issue.
Users of FreeRADIUS are advised to upgrade to these erratum packages
containing FreeRADIUS 0.9.3 which is not vulnerable to these issues.
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.
Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate. The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:
Affected Products
- Red Hat Enterprise Linux Server 3 x86_64
- Red Hat Enterprise Linux Server 3 ia64
- Red Hat Enterprise Linux Server 3 i386
- Red Hat Enterprise Linux for IBM z Systems 3 s390x
- Red Hat Enterprise Linux for IBM z Systems 3 s390
- Red Hat Enterprise Linux for Power, big endian 3 ppc
Fixes
- BZ - 110901 - CAN-2003-0967/8 FreeRadius remote DoS
CVEs
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.