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OpenSSL 1.1.1 < 1.1.1e-dev Procedure Overflow Vulnerability
medium Nessus Plugin ID 132725
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Synopsis
The remote service is affected by a procedure overflow vulnerability.Description
The version of OpenSSL installed on the remote host is prior to 1.1.1e-dev. It is, therefore, affected by a vulnerability as referenced in the 1.1.1e-dev advisory.- There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely.
Attacks against DH512 are considered just feasible.
However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway.
Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME.
Fixed in OpenSSL 1.1.1e-dev (Affected 1.1.1-1.1.1d).
(CVE-2019-1551)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to OpenSSL version 1.1.1e-dev or later.See Also
Plugin Details
Severity: Medium
ID: 132725
File Name: openssl_1_1_1e_dev.nasl
Version: 1.4
Type: remote
Family: Web Servers
Published: 1/9/2020
Updated: 5/8/2020
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.2
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2019-1551
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:openssl:openssl
Required KB Items: openssl/port
Exploit Ease: No known exploits are available
Patch Publication Date: 12/6/2019
Vulnerability Publication Date: 12/6/2019
Reference Information
CVE: CVE-2019-1551
IAVA: 2019-A-0303-S