Arch Linux update for exim



Published: 2019-10-03
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-16928
CWE-ID CWE-122
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
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Arch Linux
Operating systems & Components / Operating system

Vendor Arch Linux

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU21399

Risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2019-16928

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the string_vformat() function in string.c when processing an overly long argument for EHLO command. A remote non-authenticated attacker can send a very long string as an argument for the EHLO command, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package exim to version 4.92.3-1.

Vulnerable software versions

Arch Linux: All versions

External links

http://security.archlinux.org/advisory/ASA-201910-1


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?

Yes. This vulnerability is being exploited in the wild.



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