Envoy up to 1.12.0 continue_on_listener_filters_timeout TCP Connection infinite loop

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

Summaryinfo

A vulnerability has been found in Envoy up to 1.12.0 and classified as problematic. The impacted element is the function continue_on_listener_filters_timeout. The manipulation as part of TCP Connection leads to infinite loop. This vulnerability is referenced as CVE-2019-18836. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Envoy up to 1.12.0. It has been rated as problematic. This issue affects the function continue_on_listener_filters_timeout. The manipulation as part of a TCP Connection leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. The summary by CVE is:

Envoy before 1.12.1 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.

The weakness was published 11/11/2019 (GitHub Repository). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2019-18836 since 11/07/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.12.1 eliminates this vulnerability.

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Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.7
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: Infinite loop
CWE: CWE-835 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Envoy 1.12.1

Timelineinfo

11/07/2019 🔍
11/11/2019 +4 days 🔍
11/11/2019 +0 days 🔍
02/11/2024 +1553 days 🔍

Sourcesinfo

Advisory: 18229
Status: Not defined

CVE: CVE-2019-18836 (🔍)
GCVE (CVE): GCVE-0-2019-18836
GCVE (VulDB): GCVE-100-145295

Entryinfo

Created: 11/11/2019 08:33
Updated: 02/11/2024 09:43
Changes: 11/11/2019 08:33 (39), 11/11/2019 08:38 (17), 02/11/2024 09:43 (4)
Complete: 🔍
Cache ID: 216::103

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