CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.3 | $0-$5k | 0.00 |
A vulnerability, which was classified as problematic, has been found in OpenSSL up to 1.0.2o/1.1.0h (Network Encryption Software). Affected by this issue is an unknown function of the component TLS Handshake. The manipulation with an unknown input leads to a key management vulnerability. Using CWE to declare the problem leads to CWE-320. Impacted is availability. CVE summarizes:
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
The bug was discovered 06/12/2018. The weakness was presented 06/12/2018 by Guido Vranken as confirmed git commit (GIT Repository). The advisory is available at git.openssl.org. This vulnerability is handled as CVE-2018-0732 since 11/30/2017. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.
The vulnerability scanner Nessus provides a plugin with the ID 110878 (EulerOS 2.0 SP3 : openssl110f (EulerOS-SA-2018-1214)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157823 (Oracle Enterprise Linux Security Update for openssl (ELSA-2018-4249)).
Upgrading to version 1.0.2p-dev or 1.1.0i-dev eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.openssl.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (110878). See 90449, 91385, 91680 and 91681 for similar entries.
Product
Type
Name
Version
- 1.0.2
- 1.0.2a
- 1.0.2b
- 1.0.2c
- 1.0.2d
- 1.0.2e
- 1.0.2f
- 1.0.2g
- 1.0.2h
- 1.0.2i
- 1.0.2j
- 1.0.2k
- 1.0.2l
- 1.0.2m
- 1.0.2n
- 1.0.2o
- 1.1.0
- 1.1.0a
- 1.1.0b
- 1.1.0c
- 1.1.0d
- 1.1.0e
- 1.1.0f
- 1.1.0g
- 1.1.0h
License
Support
- end of life (old version)
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 6.4VulDB 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: 🔍
CVSSv2
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VulDB Base Score: 🔍
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Exploiting
Class: Key managementCWE: CWE-320
ATT&CK: T1600.001
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
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Nessus ID: 110878
Nessus Name: EulerOS 2.0 SP3 : openssl110f (EulerOS-SA-2018-1214)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
Exposure Time: 🔍
Upgrade: OpenSSL 1.0.2p-dev/1.1.0i-dev
Patch: 3984ef0b72831da8b3ece4745cac4f8575b19098
Timeline
11/30/2017 🔍06/12/2018 🔍
06/12/2018 🔍
06/12/2018 🔍
06/12/2018 🔍
06/12/2018 🔍
06/27/2018 🔍
07/03/2018 🔍
03/22/2023 🔍
Sources
Product: openssl.orgAdvisory: RHSA-2018:2552
Researcher: Guido Vranken
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2018-0732 (🔍)
OVAL: 🔍
SecurityTracker: 1041090
SecurityFocus: 104442 - OpenSSL CVE-2018-0732 Denial of Service Vulnerability
See also: 🔍
Entry
Created: 06/12/2018 21:42Updated: 03/22/2023 14:56
Changes: 06/12/2018 21:42 (80), 06/27/2020 20:04 (4), 03/22/2023 14:56 (6)
Complete: 🔍
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