ncurses up to 6.1 tinfo/parse_entry.c _nc_parse_entry null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in ncurses up to 6.1. Affected by this issue is the function _nc_parse_entry of the file tinfo/parse_entry.c. The manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2018-10754. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in ncurses up to 6.1. This issue affects the function _nc_parse_entry of the file tinfo/parse_entry.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In ncurses before 6.1.20180414, there is a NULL Pointer Dereference in the _nc_parse_entry function of tinfo/parse_entry.c. It could lead to a remote denial of service if the terminfo library code is used to process untrusted terminfo data in which a use-name is invalid syntax.

The bug was discovered 04/12/2018. The weakness was released 05/05/2018 (Website). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2018-10754 since 05/04/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful 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 22 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110251 (Fedora 27 : ncurses (2018-6c01a593b0)), 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 351337 (Amazon Linux Security Advisory for ncurses: ALAS2-2018-1053).

Upgrading to version 6.1.20180414 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 (110251). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110251
Nessus Name: Fedora 27 : ncurses (2018-6c01a593b0)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 855110
OpenVAS Name: Fedora Update for ncurses FEDORA-2018-6c01a593b0
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: 🔍

Upgrade: ncurses 6.1.20180414

Timelineinfo

04/12/2018 🔍
05/04/2018 +21 days 🔍
05/04/2018 +0 days 🔍
05/05/2018 +1 days 🔍
05/05/2018 +0 days 🔍
05/30/2018 +25 days 🔍
05/31/2018 +1 days 🔍
02/02/2020 +612 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2018-10754 (🔍)
GCVE (CVE): GCVE-0-2018-10754
GCVE (VulDB): GCVE-100-117371

Entryinfo

Created: 05/05/2018 17:18
Updated: 02/02/2020 15:18
Changes: 05/05/2018 17:18 (58), 02/02/2020 15:18 (8)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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