| VID |
22767 |
| Severity |
40 |
| Port |
80, ... |
| Protocol |
TCP |
| Class |
WWW |
| Detailed Description |
According to its banner, the remote host is running a version of OpenSSL 1.0.2 prior to 1.0.2k. It is, therefore, affected by the following vulnerabilities :
- A carry propagation error exists in the Broadwell-specific Montgomery multiplication procedure when handling input lengths divisible by but longer than 256 bits. This can result in transient authentication and key negotiation failures or reproducible erroneous outcomes of public-key operations with specially crafted input. A man-in-the-middle attacker can possibly exploit this issue to compromise ECDH key negotiations that utilize Brainpool P-512 curves. (CVE-2016-7055)
- An out-of-bounds read error exists when handling packets using the CHACHA20/POLY1305 or RC4-MD5 ciphers. An unauthenticated, remote attacker can exploit this, via specially crafted truncated packets, to cause a denial of service condition. (CVE-2017-3731)
- A carry propagating error exists in the x86_64 Montgomery squaring implementation that may cause the BN_mod_exp() function to produce incorrect results. An unauthenticated, remote attacker with sufficient resources can exploit this to obtain sensitive information regarding private keys. (CVE-2017-3732)
* References:
https://www.openssl.org/news/secadv/20170126.txt
* Platforms Affected:
OpenSSL 1.0.2 before 1.0.2k
Linux Any version
Unix Any version
Microsoft Windows Any version |
| Recommendation |
Upgrade to the latest version of OpenSSL (1.0.2k or later), available from the OpenSSL Web site at http://www.openssl.org/ |
| Related URL |
CVE-2016-7055,CVE-2017-3731,CVE-2017-3732 (CVE) |
| Related URL |
94242,95813,95814 (SecurityFocus) |
| Related URL |
(ISS) |
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