Denial of service in PostSRSd



Published: 2021-03-28
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID N/A
CWE ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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postsrsd
Server applications / Mail servers

Vendor roehling (Timo Röhling)

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Input validation error

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: N/A

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when processing an overly long email address. A remote attacker can trick PostFix to pass a whole list of addresses as single query to PostSRSd and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

postsrsd: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10

CPE External links

https://github.com/roehling/postsrsd/releases/tag/1.11

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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