ALAS2-2020-1515

Amazon Linux 2 Security Advisory: ALAS-2020-1515
Advisory Release Date: 2020-10-22 17:34 Pacific
Advisory Updated Date: 2020-10-22 22:36 Pacific
Severity: Medium
Issue Overview:

It was discovered freeradius does not correctly configure logrotate, allowing a local attacker who already has control of the radiusd user to escalate his privileges to root, by tricking logrotate into writing a radiusd-writable file to a directory normally inaccessible by the radiusd user. (CVE-2019-10143)

An information leak was discovered in the implementation of EAP-pwd in freeradius. An attacker could initiate several EAP-pwd handshakes to leak information, which can then be used to recover the user's WiFi password by performing dictionary and brute-force attacks. (CVE-2019-13456)

In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all handshakes. This mean multiple threads use the same BN_CTX instance concurrently, resulting in crashes when concurrent EAP-pwd handshakes are initiated. This can be abused by an adversary as a Denial-of-Service (DoS) attack. (CVE-2019-17185)


Affected Packages:

freeradius


Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update freeradius to update your system.

New Packages:
aarch64:
    freeradius-3.0.13-15.amzn2.aarch64
    freeradius-doc-3.0.13-15.amzn2.aarch64
    freeradius-utils-3.0.13-15.amzn2.aarch64
    freeradius-devel-3.0.13-15.amzn2.aarch64
    freeradius-ldap-3.0.13-15.amzn2.aarch64
    freeradius-krb5-3.0.13-15.amzn2.aarch64
    freeradius-perl-3.0.13-15.amzn2.aarch64
    freeradius-python-3.0.13-15.amzn2.aarch64
    freeradius-mysql-3.0.13-15.amzn2.aarch64
    freeradius-postgresql-3.0.13-15.amzn2.aarch64
    freeradius-sqlite-3.0.13-15.amzn2.aarch64
    freeradius-unixODBC-3.0.13-15.amzn2.aarch64
    freeradius-debuginfo-3.0.13-15.amzn2.aarch64

i686:
    freeradius-3.0.13-15.amzn2.i686
    freeradius-doc-3.0.13-15.amzn2.i686
    freeradius-utils-3.0.13-15.amzn2.i686
    freeradius-devel-3.0.13-15.amzn2.i686
    freeradius-ldap-3.0.13-15.amzn2.i686
    freeradius-krb5-3.0.13-15.amzn2.i686
    freeradius-perl-3.0.13-15.amzn2.i686
    freeradius-python-3.0.13-15.amzn2.i686
    freeradius-mysql-3.0.13-15.amzn2.i686
    freeradius-postgresql-3.0.13-15.amzn2.i686
    freeradius-sqlite-3.0.13-15.amzn2.i686
    freeradius-unixODBC-3.0.13-15.amzn2.i686
    freeradius-debuginfo-3.0.13-15.amzn2.i686

src:
    freeradius-3.0.13-15.amzn2.src

x86_64:
    freeradius-3.0.13-15.amzn2.x86_64
    freeradius-doc-3.0.13-15.amzn2.x86_64
    freeradius-utils-3.0.13-15.amzn2.x86_64
    freeradius-devel-3.0.13-15.amzn2.x86_64
    freeradius-ldap-3.0.13-15.amzn2.x86_64
    freeradius-krb5-3.0.13-15.amzn2.x86_64
    freeradius-perl-3.0.13-15.amzn2.x86_64
    freeradius-python-3.0.13-15.amzn2.x86_64
    freeradius-mysql-3.0.13-15.amzn2.x86_64
    freeradius-postgresql-3.0.13-15.amzn2.x86_64
    freeradius-sqlite-3.0.13-15.amzn2.x86_64
    freeradius-unixODBC-3.0.13-15.amzn2.x86_64
    freeradius-debuginfo-3.0.13-15.amzn2.x86_64

Additional References

Red Hat: CVE-2019-10143, CVE-2019-13456, CVE-2019-17185

Mitre: CVE-2019-10143, CVE-2019-13456, CVE-2019-17185