CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.5 | $0-$5k | 0.03 |
A vulnerability, which was classified as critical, has been found in OpenSSL up to 1.1.0g (Network Encryption Software). Affected by this issue is the function CRYPTO_memcmp
of the component PA-RISC. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:
Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).
The bug was discovered 03/27/2018. The weakness was disclosed 03/27/2018 as confirmed git commit (GIT Repository). The advisory is shared for download at git.openssl.org. This vulnerability is handled as CVE-2018-0733 since 11/30/2017. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/24/2023).
The vulnerability scanner Nessus provides a plugin with the ID 108775 (Fedora 26 : 1:openssl (2018-40dc8b8b16)), 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 351343 (Amazon Linux Security Advisory for openssl: ALAS-2018-1065).
Upgrading to version 1.1.0h 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 upgrading to the latest version. A possible mitigation has been published 5 days after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (108775). The entries 79791, 95830, 97118 and 99028 are pretty similar.
Product
Type
Name
Version
License
Support
- end of life (old version)
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.6VulDB Meta Temp Score: 6.5
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 5.9
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 108775
Nessus Name: Fedora 26 : 1:openssl (2018-40dc8b8b16)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 55734
OpenVAS Name: Fedora Update for openssl FEDORA-2018-40dc8b8b16
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: OpenSSL 1.1.0h
Patch: 56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f
Timeline
11/30/2017 🔍03/27/2018 🔍
03/27/2018 🔍
03/27/2018 🔍
03/27/2018 🔍
03/28/2018 🔍
04/01/2018 🔍
04/02/2018 🔍
02/24/2023 🔍
Sources
Product: openssl.orgAdvisory: FEDORA-2018-40dc8b8b16
Researcher: Peter Waltenberg
Status: Confirmed
Confirmation: 🔍
CVE: CVE-2018-0733 (🔍)
SecurityTracker: 1040576
SecurityFocus: 103517 - OpenSSL CVE-2018-0733 Security Bypass Vulnerability
See also: 🔍
Entry
Created: 03/28/2018 10:32Updated: 02/24/2023 12:13
Changes: 03/28/2018 10:32 (80), 01/17/2020 09:35 (5), 02/06/2021 09:58 (3), 02/06/2021 10:01 (1), 02/24/2023 12:05 (3), 02/24/2023 12:13 (1)
Complete: 🔍
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