Information disclosure in OpenSSL

Published: 2019-12-08 | Updated: 2020-03-18
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1551
Exploitation vector Network
Public exploit N/A
Vulnerable software
Server applications / Encryption software

Vendor OpenSSL Software Foundation

Security Advisory

Updated: 18.03.2020

Changed bulletin status ti patched.

1) Cryptographic issues

Risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-1551

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No


The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to an overflow issue within the rsaz_512_sqr(): the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. A remote attacker can perform an attack against DH512 keys.


Install update from vendor's website.

Vulnerable software versions

OpenSSL: 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, 1.0.2p, 1.0.2q, 1.0.2r, 1.0.2s, 1.0.2t, 1.1.1, 1.1.1a, 1.1.1b, 1.1.1c, 1.1.1d

CPE External links;a=commitdiff;h=419102400a2811582a7a3d4a4e317d72e5ce0a8f;a=commitdiff;h=f1c5eea8a817075d31e43f5876993c6710238c98

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.