Unspecified vulnerability in the X11 dissector in Ethereal 0.10.12 and earlier allows remote attackers to cause a denial of service (divide-by-zero) via unknown vectors.

Several remote vulnerabilities have been discovered in the Ethereal network scanner, which may lead to the execution of arbitrary code.
The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2006-4333     It was discovered that the Q.2391 dissector is     vulnerable to denial of service caused by memory     exhaustion.

  - CVE-2005-3241     It was discovered that the FC-FCS, RSVP and ISIS-LSP     dissectors are vulnerable to denial of service caused by     memory exhaustion.

  - CVE-2005-3242     It was discovered that the IrDA and SMB dissectors are     vulnerable to denial of service caused by memory     corruption.

  - CVE-2005-3243     It was discovered that the SLIMP3 and AgentX dissectors     are vulnerable to code injection caused by buffer     overflows.

  - CVE-2005-3244     It was discovered that the BER dissector is vulnerable     to denial of service caused by an infinite loop.

  - CVE-2005-3246     It was discovered that the NCP and RTnet dissectors are     vulnerable to denial of service caused by a NULL pointer     dereference.

  - CVE-2005-3248     It was discovered that the X11 dissector is vulnerable     to denial of service caused by a division through zero.

This update also fixes a 64 bit-specific regression in the ASN.1 decoder, which was introduced in a previous DSA.

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.

The ethereal package is a program for monitoring network traffic.

A number of security flaws have been discovered in Ethereal. On a system where Ethereal is running, a remote attacker could send malicious packets to trigger these flaws and cause Ethereal to crash or potentially execute arbitrary code. The Common Vulnerabilities and Exposures project has assigned the names CVE-2005-3241, CVE-2005-3242, CVE-2005-3243, CVE-2005-3244, CVE-2005-3245, CVE-2005-3246, CVE-2005-3247, CVE-2005-3248, CVE-2005-3249, and CVE-2005-3184 to these issues.

Users of ethereal should upgrade to these updated packages, which contain version 0.10.13 and are 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
22713	Debian DSA-1171-1 : ethereal - several vulnerabilities	Nessus	Debian Local Security Checks	high
21865	CentOS 3 / 4 : ethereal (CESA-2005:809)	Nessus	CentOS Local Security Checks	critical
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
20105	RHEL 2.1 / 3 / 4 : ethereal (RHSA-2005:809)	Nessus	Red Hat Local Security Checks	critical

Detections

Analytics

CVE-2005-3248

high

Tenable Plugins

high

critical

critical

critical

critical