Resource exhaustion in postsrsd



Published: 2020-12-23
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-35573
CWE ID CWE-400
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) Resource exhaustion

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-35573

CWE-ID: CWE-400 - Uncontrolled Resource Consumption ('Resource Exhaustion')

Exploit availability: No

Description

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

srs2.c in PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address.

Mitigation

Install update from vendor's website.

Vulnerable software versions

postsrsd: 1.0

CPE External links

https://github.com/roehling/postsrsd/commit/4733fb11f6bec6524bb8518c5e1a699288c26bac
https://lists.debian.org/debian-lts-announce/2020/12/msg00031.html

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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