Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU32043
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-15721
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in Irssi before 1.0.5, certain incorrectly formatted DCC CTCP messages could cause a NULL pointer dereference. This is a separate, but similar, issue relative to CVE-2017-9468. A remote attacker can perform a denial of service (DoS) attack.
MitigationUpdate to version 1.0.5.
Vulnerable software versionsIrssi: 1.0.0 - 1.0.4
CPE2.3https://openwall.com/lists/oss-security/2017/10/22/4
https://irssi.org/security/irssi_sa_2017_10.txt
https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html
https://www.debian.org/security/2017/dsa-4016
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.