Discount 2.2.3a markdown.c islist Markdown memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Discount 2.2.3a. Affected by this issue is the function islist of the file markdown.c. The manipulation as part of a Markdown leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The islist function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.

The bug was discovered 05/23/2018. The weakness was disclosed 05/26/2018 (Website). The advisory is available at github.com. This vulnerability is handled as CVE-2018-11504 since 05/26/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117503 (Debian DSA-4293-1 : discount - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117503). The entries VDB-118219, VDB-118261 and VDB-119606 are pretty similar.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117503
Nessus Name: Debian DSA-4293-1 : discount - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

05/23/2018 🔍
05/26/2018 +2 days 🔍
05/26/2018 +0 days 🔍
05/26/2018 +0 days 🔍
05/27/2018 +1 days 🔍
09/14/2018 +110 days 🔍
09/17/2018 +3 days 🔍
03/17/2023 +1642 days 🔍

Sourcesinfo

Advisory: 189
Status: Not defined

CVE: CVE-2018-11504 (🔍)
OVAL: 🔍
See also: 🔍

Entryinfo

Created: 05/27/2018 11:16 AM
Updated: 03/17/2023 11:57 AM
Changes: 05/27/2018 11:16 AM (71), 02/09/2020 09:05 AM (3), 03/17/2023 11:50 AM (4), 03/17/2023 11:57 AM (1)
Complete: 🔍
Cache ID: 18:804:40

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