PT-2019-18175 · F5 · Big-Ip

Published 1999-01-01 · Updated 2021-07-21 · CVE-2019-6593

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions BIG-IP versions 11.5.1 through 11.5.4 BIG-IP version 11.6.1 BIG-IP version 12.1.0

Description A chosen ciphertext attack against CBC ciphers may be possible when a virtual server is configured with a Client SSL profile. This could result in plaintext recovery of encrypted messages through a man-in-the-middle (MITM) attack, without the attacker needing access to the server's private key.

Recommendations For BIG-IP versions 11.5.1 through 11.5.4, update to a version that is not vulnerable to this issue. For BIG-IP version 11.6.1, update to a version that is not vulnerable to this issue. For BIG-IP version 12.1.0, update to a version that is not vulnerable to this issue. As a temporary workaround, consider restricting the use of CBC ciphers in Client SSL profiles until a patch is available.

Fix

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-327

Related Identifiers

CVE-2019-6593

LOWSTRENGTHCIPHERSUITESCHECK

Affected Products

Big-Ip

References · 11

• https://support.f5.com/csp/article/K10065173 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-6593 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2012-4929 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2013-0169 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-5592 · Security Note
• https://osv.dev/vulnerability/CVE-2019-6593 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2014-3566 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2011-3389 · Security Note
• https://freakattack.com · Note
• https://shattered.io · Note
• https://sweet32.info · Note