PCS prior 0.9.164/0.10 REST Interface /remote/put_file access control
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.2 | $0-$5k | 0.00 |
A vulnerability classified as critical was found in PCS. Affected by this vulnerability is an unknown code block of the file /remote/put_file of the component REST Interface. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
pcs before version 0.9.164 and 0.10 is vulnerable to a privilege escalation via authorized user malicious REST call. The REST interface of the pcsd service did not properly sanitize the file name from the /remote/put_file query. If the /etc/booth directory exists, an authenticated attacker with write permissions could create or overwrite arbitrary files with arbitrary data outside of the /etc/booth directory, in the context of the pcsd process.
The bug was discovered 04/09/2018. The weakness was released 04/12/2018 (Website). It is possible to read the advisory at access.redhat.com. This vulnerability is known as CVE-2018-1079 since 12/04/2017. The exploitation appears to be easy. The attack can be launched remotely. The requirement for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.
The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109152 (Fedora 26 : pcs (2018-ce5d7106d8)), 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 277270 (Fedora Security Update for pcs (FEDORA-2018-ce5d7106d8)).
Upgrading to version 0.9.164 or 0.10 eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (109152). Entry connected to this vulnerability is available at 116193.
Product
Name
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.4VulDB Meta Temp Score: 6.2
VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 6.5
NVD Vector: 🔍
CVSSv2
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unlock | unlock | unlock | unlock | unlock | unlock |
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VulDB Base Score: 🔍
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Exploiting
Class: Access controlCWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 109152
Nessus Name: Fedora 26 : pcs (2018-ce5d7106d8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 861368
OpenVAS Name: Fedora Update for pcs FEDORA-2018-ce5d7106d8
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: PCS 0.9.164/0.10
Timeline
12/04/2017 🔍04/09/2018 🔍
04/12/2018 🔍
04/12/2018 🔍
04/16/2018 🔍
04/19/2018 🔍
04/19/2018 🔍
02/28/2023 🔍
Sources
Advisory: FEDORA-2018-ce5d7106d8Status: Not defined
CVE: CVE-2018-1079 (🔍)
See also: 🔍
Entry
Created: 04/16/2018 09:11Updated: 02/28/2023 08:15
Changes: 04/16/2018 09:11 (73), 01/25/2020 08:04 (2), 02/10/2021 07:13 (2), 02/28/2023 08:12 (3), 02/28/2023 08:15 (1)
Complete: 🔍
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