Candidate: CVE-2020-12457
PublicDate: 2020-08-21 14:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12457
 https://github.com/wolfSSL/wolfssl/pull/2927
 https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable
Description:
 An issue was discovered in wolfSSL before 4.5.0. It mishandles the
 change_cipher_spec (CCS) message processing logic for TLS 1.3. If an
 attacker sends ChangeCipherSpec messages in a crafted way involving more
 than one in a row, the server becomes stuck in the ProcessReply() loop,
 i.e., a denial of service.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
Priority: low
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H [7.5 HIGH]


Patches_wolfssl:
 upstream: https://github.com/wolfSSL/wolfssl/commit/df1b7f34f173cfc2968ce12e8fcd2fd8bcc61a59 (v4.5.0-stable)
upstream_wolfssl: released (v4.5.0-stable)
precise/esm_wolfssl: DNE
trusty_wolfssl: ignored (out of standard support)
trusty/esm_wolfssl: DNE
xenial_wolfssl: ignored (end of standard support, was needed)
bionic_wolfssl: needed
focal_wolfssl: needed
groovy_wolfssl: not-affected (4.5.0+dfsg-2)
hirsute_wolfssl: not-affected (4.5.0+dfsg-2)
impish_wolfssl: not-affected (4.5.0+dfsg-2)
jammy_wolfssl: not-affected (4.5.0+dfsg-2)
devel_wolfssl: not-affected (4.5.0+dfsg-2)