KDE KsIRC PRIVMSG buffer overflow

ksirc-privmsg-bo (31134) The risk level is classified as LowLow Risk

Description:

KDE KsIRC is vulnerable to a buffer overflow, caused by improper bounds checking of private messages. By sending an overly long PRIVMSG to a KsIRC client, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 7
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.5
  Exploitability: Proof-Of-Concept
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

For KDE:
Refer to KDE Security Advisory 20070109-1 for patch, upgrade, or suggested workaround information. See References.

For Mandriva Linux:
Refer to MDKSA-2007:009 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux:
Refer to USN-409-1 for patch, upgrade, or suggested workaround information. See References.

For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 200701-26 for patch, upgrade, or suggested workaround information. See References.

For Turbolinux (KDE):
Refer to TLSA-2007-15 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • Debian - KDE IRC client Web page: Ksirc package.
  • KDE Security Advisory 20070109-1: ksirc denial of service vulnerability.
  • BID-21790: KSirc IRC Client Remote PRIVMSG Denial of Service Vulnerability
  • CVE-2006-6811: KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.
  • GLSA-200701-26: KSirc: Denial of Service vulnerability
  • MDKSA-2007:009: Updated kdenetwork packages fix ksirc vulnerability
  • OSVDB ID: 33443: KDE KsIRC PRIVMSG String Remote DoS
  • SECTRACK ID: 1017453: KSirc Client PRIVMSG Buffer Overflow May Let Remote Users Execute Arbitrary Code

Platforms Affected:

  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Gentoo Linux
  • KDE KDE 3.5.5
  • KDE Ksirc 1.3.12
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • Turbolinux Turbolinux FUJI
  • Turbolinux Turbolinux wizpy

Reported:

Dec 26, 2006

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