VDB-110953 · CVE-2017-17812 · Nessus 106079

NASM 2.14rc0 asm/preproc.c detoken memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	1.35

Summaryinfo

A vulnerability has been found in NASM 2.14rc0 and classified as critical. The impacted element is the function detoken of the file asm/preproc.c. This manipulation causes memory corruption. This vulnerability appears as CVE-2017-17812. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in NASM 2.14rc0 (Programming Tool Software). Affected by this vulnerability is the function detoken of the file asm/preproc.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In Netwide Assembler (NASM) 2.14rc0, there is a heap-based buffer over-read in the function detoken() in asm/preproc.c that will cause a remote denial of service attack.

The bug was discovered 08/28/2017. The weakness was presented 12/21/2017 (Website). The advisory is shared at repo.or.cz. This vulnerability is known as CVE-2017-17812 since 12/20/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 114 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106079 (Fedora 26 : nasm (2018-48569250d1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277216 (Fedora Security Update for nasm (FEDORA-2018-b1f3217ae6)).

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

The vulnerability is also documented in the vulnerability database at Tenable (106079). See VDB-110951, VDB-110952, VDB-110954 and VDB-110955 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Programming Tool Software

Name

NASM

Version

2.14rc0

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 106079
Nessus Name: Fedora 26 : nasm (2018-48569250d1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 803118
OpenVAS Name: Fedora Update for nasm FEDORA-2018-48569250d1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: repo.or.cz

Timelineinfo

08/28/2017 🔍
12/20/2017 +114 days 🔍
12/20/2017 +0 days 🔍
12/21/2017 +1 days 🔍
12/21/2017 +0 days 🔍
01/16/2018 +26 days 🔍
01/17/2018 +1 days 🔍
01/18/2023 +1827 days 🔍

Sourcesinfo

Advisory: FEDORA-2018-48569250d1
Status: Not defined

CVE: CVE-2017-17812 (🔍)
GCVE (CVE): GCVE-0-2017-17812
GCVE (VulDB): GCVE-100-110953
See also: 🔍

Entryinfo

Created: 12/21/2017 14:02
Updated: 01/18/2023 14:47
Changes: 12/21/2017 14:02 (73), 12/17/2019 09:32 (3), 01/18/2023 14:38 (5), 01/18/2023 14:43 (1), 01/18/2023 14:47 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.