NULL pointer dereference in dircproxy (Alpine package)

1) NULL pointer dereference

EUVDB-ID: #VU29269

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-2007-5226

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in irc_server.c in dircproxy. A remote attacker can trigger denial of service conditions via an ACTION command without a parameter, which triggers a NULL pointer dereference, as demonstrated using a blank /me message from irssi.

Mitigation

Install update from vendor's website.

Vulnerable software versions

dircproxy (Alpine package): 1.1.0-r0 - 1.1.0-r2

CPE2.3

• cpe:2.3:a:alpine:dircproxy_alpine_package:1.1.0-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:a:alpine:dircproxy_alpine_package:1.1.0-r2:*:*:*:*:alpine_linux:*:2.6

External links

https://git.alpinelinux.org/aports/commit/?id=5b217ffc21a3a78f24a6b491717ac95b0a1929ab

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.