systemd-resolved up to 233 DNS Response null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in systemd-resolved up to 233. Affected by this issue is some unknown functionality of the component DNS Response Handler. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2017-9217. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in systemd-resolved up to 233 and classified as problematic. This vulnerability affects some unknown functionality of the component DNS Response Handler. The manipulation with an unknown input leads to a input validation 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. CVE summarizes:

systemd-resolved through 233 allows remote attackers to cause a denial of service (daemon crash) via a crafted DNS response with an empty question section.

The bug was discovered 09/08/2016. The weakness was published 05/24/2017 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability was named CVE-2017-9217 since 05/24/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 258 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100740 (Fedora 24 : systemd (2017-0a1b2d495a)), 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 170195 (OpenSUSE Security Update for systemd (openSUSE-SU-2017:1844-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100740) and SecurityFocus (BID 98677†). Once again VulDB remains the best source 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: 100740
Nessus Name: Fedora 24 : systemd (2017-0a1b2d495a)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for systemd FEDORA-2017-8ff992386d
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: github.com

Timelineinfo

09/08/2016 🔍
05/24/2017 +258 days 🔍
05/24/2017 +0 days 🔍
05/24/2017 +0 days 🔍
05/24/2017 +0 days 🔍
05/24/2017 +0 days 🔍
06/11/2017 +18 days 🔍
06/13/2017 +2 days 🔍
12/13/2024 +2740 days 🔍

Sourcesinfo

Advisory: FEDORA-2017-0a1b2d495a
Researcher: KulykIevgen
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-9217 (🔍)
GCVE (CVE): GCVE-0-2017-9217
GCVE (VulDB): GCVE-100-101740
SecurityFocus: 98677 - systemd-resolved 'resolved-dns-packet.c' Denial of Service Vulnerability
OSVDB: - CVE-2017-9217 - systemd-resolved - Denial of Service Issue

Entryinfo

Created: 05/24/2017 19:17
Updated: 12/13/2024 17:42
Changes: 05/24/2017 19:17 (78), 10/02/2020 17:47 (1), 12/25/2020 14:57 (3), 12/07/2022 10:20 (4), 12/07/2022 10:26 (1), 12/07/2022 10:32 (1), 12/13/2024 17:42 (20)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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