Fyodor Nmap 7.70 SSH Connection nse_libssh2.cc double free

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Fyodor Nmap 7.70. This vulnerability affects unknown code in the library nse_libssh2.cc of the component SSH Connection Handler. The manipulation leads to double free. This vulnerability is listed as CVE-2017-18594. The attack may be initiated remotely. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Fyodor Nmap 7.70 (Security Testing Software). This issue affects an unknown functionality in the library nse_libssh2.cc of the component SSH Connection Handler. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is availability. The summary by CVE is:

nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated by a leading \n character to ssh-brute.nse or ssh-auth-methods.nse.

The weakness was presented 08/29/2019 (GitHub Repository). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2017-18594 since 08/28/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

github.com is providing further details. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.6

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

11/29/2018 🔍
08/28/2019 +272 days 🔍
08/29/2019 +1 days 🔍
08/29/2019 +0 days 🔍
12/07/2023 +1561 days 🔍

Sourcesinfo

Advisory: 350bbe0597d37ad67abe5fef8fba984707b4e9ad
Status: Not defined

CVE: CVE-2017-18594 (🔍)
GCVE (CVE): GCVE-0-2017-18594
GCVE (VulDB): GCVE-100-141023
scip Labs: https://www.scip.ch/en/?labs.20130625
Misc.: 🔍

Entryinfo

Created: 08/29/2019 11:03
Updated: 12/07/2023 13:30
Changes: 08/29/2019 11:03 (42), 08/08/2020 14:59 (18), 12/07/2023 13:30 (4)
Complete: 🔍
Cache ID: 216::103

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