Debian update for proftpd-dfsg

1) Use-after-free

EUVDB-ID: #VU25595

Risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-9273

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing data transfer within the alloc_pool() function in pool.c. A remote authenticated attacker can trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update proftpd-dfsg package to one of the following versions: 1.3.5b-4+deb9u4, 1.3.6-4+deb10u4.

Vulnerable software versions

proftpd-dfsg (Debian package): 1.3.5b-4+deb9u1 - 1.3.6-4+deb10u3

CPE2.3

• cpe:2.3:o:debian:proftpd-dfsg_debian_package:1.3.5b-4 deb9u1:*:*:*:*:debian_linux:*:*
• cpe:2.3:o:debian:proftpd-dfsg_debian_package:1.3.5b-4 deb9u2:*:*:*:*:debian_linux:*:*
• cpe:2.3:o:debian:proftpd-dfsg_debian_package:1.3.5b-4 deb9u3:*:*:*:*:debian_linux:*:*

External links

https://www.debian.org/security/2020/dsa-4635

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.