ncurses 6.0 terminfo tinfo/parse_entry.c nc_parse_entry null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in ncurses 6.0. The impacted element is the function nc_parse_entry of the file tinfo/parse_entry.c of the component terminfo. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2017-11113. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ncurses 6.0. It has been declared as problematic. Affected by this vulnerability is the function nc_parse_entry of the file tinfo/parse_entry.c of the component terminfo. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

In ncurses 6.0, 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 attack if the terminfo library code is used to process untrusted terminfo data.

The bug was discovered 06/27/2017. The weakness was presented 07/08/2017 (Website). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2017-11113 since 07/08/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 11 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102471 (openSUSE Security Update : ncurses (openSUSE-2017-920)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170240 (SUSE Enterprise Linux Security Update for ncurses (SUSE-SU-2017:2076-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (102471). See VDB-103362 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

License

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 102471
Nessus Name: openSUSE Security Update : ncurses (openSUSE-2017-920)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

06/27/2017 🔍
07/08/2017 +11 days 🔍
07/08/2017 +0 days 🔍
07/08/2017 +0 days 🔍
07/10/2017 +2 days 🔍
08/11/2017 +32 days 🔍
08/14/2017 +3 days 🔍
10/24/2019 +801 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2017-11113 (🔍)
GCVE (CVE): GCVE-0-2017-11113
GCVE (VulDB): GCVE-100-103363
See also: 🔍

Entryinfo

Created: 07/10/2017 09:28
Updated: 10/24/2019 14:38
Changes: 07/10/2017 09:28 (69), 10/24/2019 14:38 (3)
Complete: 🔍
Cache ID: 216::103

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

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