Multiple vulnerabilities in DISCOUNT

Published: 2018-05-26 | Updated: 2020-08-08

Risk	Medium
Patch available	NO
Number of vulnerabilities	2
CVE-ID	CVE-2018-11503 CVE-2018-11504
CWE-ID	CWE-125
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	DISCOUNT Client/Desktop applications / Other client software Debian Linux Operating systems & Components / Operating system
Vendor	John Gruber Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU37107

Risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-11503

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in The isfootnote function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a. A remote attacker can perform a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

DISCOUNT: 2.2.3

Debian Linux: 2.2.3 - 9.0

CPE2.3

External links

https://github.com/Orc/discount/issues/189#issuecomment-392247798
https://lists.debian.org/debian-lts-announce/2018/09/msg00009.html
https://www.debian.org/security/2018/dsa-4293

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Out-of-bounds read

EUVDB-ID: #VU37108