GNU Guile up to 2.0.12 mkdir mode permission

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GNU Guile up to 2.0.12. Affected by this vulnerability is the function mkdir. Performing a manipulation of the argument mode results in permission. This vulnerability is identified as CVE-2016-8605. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in GNU Guile up to 2.0.12. It has been classified as critical. This affects the function mkdir. The manipulation of the argument mode with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The mkdir procedure of GNU Guile temporarily changed the process' umask to zero. During that time window, in a multithreaded application, other threads could end up creating files with insecure permissions. For example, mkdir without the optional mode argument would create directories as 0777. This is fixed in Guile 2.0.13. Prior versions are affected.

The bug was discovered 10/12/2016. The weakness was released 01/12/2017 (Website). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2016-8605 since 10/11/2016. 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 attack technique deployed by this issue is T1222 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 94771 (Fedora 25 : 5:guile (2016-0aab71f552)), 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 169348 (OpenSuSE Security Update for guile (openSUSE-SU-2016:2645-1)).

Upgrading to version 2.0.13 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94771) and SecurityFocus (BID 93510†). Entry connected to this vulnerability is available at VDB-95272. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Permission
CWE: CWE-275 / CWE-266
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: 94771
Nessus Name: Fedora 25 : 5:guile (2016-0aab71f552)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 861338
OpenVAS Name: Fedora Update for guile FEDORA-2016-34209c3a8e
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Guile 2.0.13

Timelineinfo

10/11/2016 🔍
10/11/2016 +0 days 🔍
10/12/2016 +1 days 🔍
10/16/2016 +4 days 🔍
11/15/2016 +30 days 🔍
01/12/2017 +58 days 🔍
01/12/2017 +0 days 🔍
01/13/2017 +1 days 🔍
10/28/2022 +2114 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: FEDORA-2016-0aab71f552
Status: Not defined

CVE: CVE-2016-8605 (🔍)
GCVE (CVE): GCVE-0-2016-8605
GCVE (VulDB): GCVE-100-95271
SecurityFocus: 93510 - GNU Guile CVE-2016-8605 Local Security Bypass Vulnerability
OSVDB: - CVE-2016-8605 - GNU - Guile - Security Bypass Issue

See also: 🔍

Entryinfo

Created: 01/13/2017 08:12
Updated: 10/28/2022 13:56
Changes: 01/13/2017 08:12 (81), 10/28/2022 13:56 (3)
Complete: 🔍
Cache ID: 216::103

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