SB2018052605 - Multiple vulnerabilities in DISCOUNT

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2018-11503)

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.

2) Out-of-bounds read (CVE-ID: CVE-2018-11504)

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

The vulnerability exists due to a boundary error in The islist 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.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• 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