The IRC protocol dissector in Ethereal 0.10.13 allows remote attackers to cause a denial of service (infinite loop).

Updated Ethereal packages that fix various security vulnerabilities are now available.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

Ethereal is a program for monitoring network traffic.

Two denial of service bugs were found in Ethereal's IRC and GTP protocol dissectors. Ethereal could crash or stop responding if it reads a malformed IRC or GTP packet off the network. The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the names CVE-2005-3313 and CVE-2005-4585 to these issues.

A buffer overflow bug was found in Ethereal's OSPF protocol dissector.
Ethereal could crash or execute arbitrary code if it reads a malformed OSPF packet off the network. (CVE-2005-3651)

Users of ethereal should upgrade to these updated packages containing version 0.10.14, which is not vulnerable to these issues.

Ethereal 0.10.13 is now available fixing a number of security vulnerabilities in various dissectors :

  - the ISAKMP dissector could exhaust system memory

    - the FC-FCS dissector could exhaust system memory

    - the RSVP dissector could exhaust system memory

    - the ISIS LSP dissector could exhaust system memory

    - the IrDA dissector could crash

    - the SLIMP3 dissector could overflow a buffer

    - the BER dissector was susceptible to an infinite loop

    - the SCSI dissector could dereference a NULL pointer       and crash

    - the sFlow dissector could dereference a NULL pointer       and crash

    - the RTnet dissector could dereference a NULL pointer       and crash

    - the SigComp UDVM could go into an infinite loop or       crash

    - the X11 dissector could attempt to divide by zero

    - if SMB transaction payload reassembly is enabled the       SMB dissector could crash (by default this is       disabled)

  - if the 'Dissect unknown RPC program numbers' option was     enabled, the ONC RPC dissector might be able to exhaust     system memory (by default this is disabled)

  - the AgentX dissector could overflow a buffer

    - the WSP dissector could free an invalid pointer

    - iDEFENSE discovered a buffer overflow in the SRVLOC       dissector

The new version of Ethereal is provided and corrects all of these issues.

An infinite loop in the IRC dissector was also discovered and fixed after the 0.10.13 release. The updated packages include the fix.

Update :

A permissions problem on the /usr/share/ethereal/dtds directory caused errors when ethereal started as a non-root user. This update corrects the problem.

The remote host is affected by the vulnerability described in GLSA-200510-25 (Ethereal: Multiple vulnerabilities in protocol dissectors)

    There are numerous vulnerabilities in versions of Ethereal prior     to 0.10.13, including:
    The SLIM3 and AgentX dissectors     could overflow a buffer (CVE-2005-3243).
    iDEFENSE discovered a     buffer overflow in the SRVLOC dissector (CVE-2005-3184).
    Multiple potential crashes in many dissectors have been fixed, see     References for further details.
    Furthermore an infinite     loop was discovered in the IRC protocol dissector of the 0.10.13     release (CVE-2005-3313).
  Impact :

    An attacker might be able to use these vulnerabilities to crash     Ethereal or execute arbitrary code with the permissions of the user     running Ethereal, which could be the root user.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
21883	CentOS 3 / 4 : ethereal (CESA-2006:0156)	Nessus	CentOS Local Security Checks	high
20480	RHEL 2.1 / 3 / 4 : ethereal (RHSA-2006:0156)	Nessus	Red Hat Local Security Checks	high
20435	Mandrake Linux Security Advisory : ethereal (MDKSA-2005:193-2)	Nessus	Mandriva Local Security Checks	critical
20118	GLSA-200510-25 : Ethereal: Multiple vulnerabilities in protocol dissectors	Nessus	Gentoo Local Security Checks	critical

Detections

Analytics

CVE-2005-3313

high

Tenable Plugins

high

high

critical

critical