Netwide Assembler 2.14rc16 asm/preproc.c pp_getline use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Netwide Assembler 2.14rc16. This vulnerability affects the function pp_getline of the file asm/preproc.c. Performing a manipulation results in use after free. This vulnerability is known as CVE-2018-20538. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Netwide Assembler 2.14rc16 (Programming Tool Software). This affects the function pp_getline of the file asm/preproc.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

There is a use-after-free at asm/preproc.c (function pp_getline) in Netwide Assembler (NASM) 2.14rc16 that will cause a denial of service during certain finishes tests.

The bug was discovered 11/18/2018. The weakness was published 12/28/2018 (Website). The advisory is shared at bugzilla.nasm.us. This vulnerability is uniquely identified as CVE-2018-20538 since 12/27/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 40 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entry is available at VDB-128502. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/18/2018 🔍
12/27/2018 +39 days 🔍
12/28/2018 +1 days 🔍
12/28/2018 +0 days 🔍
12/29/2018 +1 days 🔍
04/24/2020 +482 days 🔍

Sourcesinfo

Advisory: bugzilla.nasm.us
Status: Not defined

CVE: CVE-2018-20538 (🔍)
GCVE (CVE): GCVE-0-2018-20538
GCVE (VulDB): GCVE-100-128505
See also: 🔍

Entryinfo

Created: 12/29/2018 17:29
Updated: 04/24/2020 21:20
Changes: 12/29/2018 17:29 (59), 04/24/2020 21:20 (1)
Complete: 🔍
Cache ID: 216::103

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

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