ncurses 6.0 terminfo tinfo/parse_entry.c append_acs input validation

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

Summaryinfo

A vulnerability classified as problematic was found in ncurses 6.0. The affected element is the function append_acs of the file tinfo/parse_entry.c of the component terminfo. The manipulation results in input validation. This vulnerability is reported as CVE-2017-11112. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in ncurses 6.0. It has been classified as problematic. Affected is the function append_acs of the file tinfo/parse_entry.c of the component terminfo. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

In ncurses 6.0, there is an attempted 0xffffffffffffffff access in the append_acs 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 06/24/2017. The weakness was disclosed 07/08/2017 (Website). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2017-11112 since 07/08/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 14 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). The entry VDB-103363 is pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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

06/24/2017 🔍
07/08/2017 +14 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-2017-11112 (🔍)
GCVE (CVE): GCVE-0-2017-11112
GCVE (VulDB): GCVE-100-103362
See also: 🔍

Entryinfo

Created: 07/10/2017 09:28
Updated: 10/24/2019 14:34
Changes: 07/10/2017 09:28 (69), 10/24/2019 14:34 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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