Published: 08/06/2009 Updated: 17/08/2017

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

VMScore: 505

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow.

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irssi irssi 0.8.13

Debian Bug report logs - #531357 irssi WALLOPS heap off-by-one Package: irssi; Maintainer for irssi is Rhonda D'Vine <rhonda@debianorg>; Source for irssi is src:irssi (PTS, buildd, popcon) Reported by: Craig <craig@haquarterde> Date: Sun, 31 May 2009 21:42:02 UTC Severity: important Tags: security Merged with 5326 ...

It was discovered that irssi did not properly check the length of strings when processing WALLOPS messages If a user connected to an IRC network where an attacker had IRC operator privileges, a remote attacker could cause a denial of service ...

source: wwwsecurityfocuscom/bid/35399/info Irssi is prone to an off-by-one, heap-based, memory-corruption vulnerability because it fails to properly bounds-check user-supplied data before copying it into a memory buffer Attackers can exploit this issue to crash the vulnerable client, resulting in a denial-of-service condition Given the ...

CWE-189 http://bugs.irssi.org/index.php?do=details&task_id=662 http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/http://www.irssi.org/ChangeLog http://www.openwall.com/lists/oss-security/2009/05/29/3 http://www.mandriva.com/security/advisories?name=MDVSA-2009:133 http://www.securitytracker.com/id?1022410 http://www.vupen.com/english/advisories/2009/1596 http://www.securityfocus.com/bid/35399 http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html http://www.ubuntu.com/usn/usn-800-1 http://secunia.com/advisories/35812 http://secunia.com/advisories/35685 http://secunia.com/advisories/36152 https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html https://exchange.xforce.ibmcloud.com/vulnerabilities/51184 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=531357 https://usn.ubuntu.com/800-1/https://nvd.nist.gov https://www.exploit-db.com/exploits/33041/

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