NASM 2.14rc0 asm/preproc.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in NASM 2.14rc0. It has been classified as problematic. This impacts an unknown function of the file asm/preproc.c. Performing a manipulation results in use after free. This vulnerability is known as CVE-2017-17814. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability, which was classified as problematic, was found in NASM 2.14rc0 (Programming Tool Software). This affects an unknown code block 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 availability. The summary by CVE is:

In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in do_directive in asm/preproc.c that will cause a remote denial of service attack.

The bug was discovered 08/28/2017. The weakness was published 12/21/2017 (Website). It is possible to read the advisory at bugzilla.nasm.us. This vulnerability is uniquely identified as CVE-2017-17814 since 12/20/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

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). Similar entries are available at VDB-110951, VDB-110952, VDB-110953 and VDB-110954. Statistical analysis made it clear that VulDB provides the best quality for 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: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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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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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: 🔍

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-2017-17814 (🔍)
GCVE (CVE): GCVE-0-2017-17814
GCVE (VulDB): GCVE-100-110955
See also: 🔍

Entryinfo

Created: 12/21/2017 02:02 PM
Updated: 01/18/2023 03:03 PM
Changes: 12/21/2017 02:02 PM (72), 12/17/2019 09:47 AM (3), 01/18/2023 02:58 PM (4), 01/18/2023 03:03 PM (1)
Complete: 🔍
Cache ID: 244:CB1:40

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