Xen up to 4.9.x PoD Error data processing

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

Summaryinfo

A vulnerability labeled as critical has been found in Xen up to 4.9.x. This vulnerability affects unknown code of the component PoD Error Handler. Such manipulation leads to data processing. This vulnerability is documented as CVE-2017-17044. The attack needs to be performed locally. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Xen up to 4.9.x (Virtualization Software). Affected by this issue is an unknown part of the component PoD Error Handler. The manipulation with an unknown input leads to a data processing vulnerability. Using CWE to declare the problem leads to CWE-19. Impacted is availability. CVE summarizes:

An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to cause a denial of service (infinite loop and host OS hang) by leveraging the mishandling of Populate on Demand (PoD) errors.

The bug was discovered 11/28/2017. The weakness was released 11/28/2017 as XSA-246 as confirmed security advisory (Website). The advisory is shared for download at xenbits.xen.org. This vulnerability is handled as CVE-2017-17044 since 11/28/2017. The attack needs to be approached locally. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 104819 (Debian DSA-4050-1 : xen - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 390086 (Oracle VM Server for x86 Security Update for xen (OVMSA-2017-0176)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104819) and SecurityFocus (BID 102008†). Entries connected to this vulnerability are available at VDB-110037 and VDB-110038. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Data processing
CWE: CWE-19
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 104819
Nessus Name: Debian DSA-4050-1 : xen - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 863063
OpenVAS Name: Citrix XenServer Multiple Security Updates (CTX230138)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

11/28/2017 🔍
11/28/2017 +0 days 🔍
11/28/2017 +0 days 🔍
11/28/2017 +0 days 🔍
11/28/2017 +0 days 🔍
11/28/2017 +0 days 🔍
11/29/2017 +1 days 🔍
11/29/2017 +0 days 🔍
01/25/2021 +1153 days 🔍

Sourcesinfo

Advisory: XSA-246
Researcher: Julien Grall
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-17044 (🔍)
GCVE (CVE): GCVE-0-2017-17044
GCVE (VulDB): GCVE-100-110036

OVAL: 🔍

SecurityFocus: 102008 - Xen CVE-2017-17044 Denial of Service Vulnerability
SecurityTracker: 1039878

See also: 🔍

Entryinfo

Created: 11/29/2017 07:45
Updated: 01/25/2021 09:56
Changes: 11/29/2017 07:45 (77), 12/11/2019 08:33 (4), 01/25/2021 09:51 (2), 01/25/2021 09:56 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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