ELA-494-1 curl security update

TLS issues

Related CVEs CVE-2021-22946 CVE-2021-22947

Two issues have been found in curl, a command line tool and an easy-to-use client-side library for transferring data with URL syntax.

CVE-2021-22946 Crafted answers from a server might force clients to not use TLS on connections though TLS was required and expected.

CVE-2021-22947 When using STARTTLS to initiate a TLS connection, the server might send multiple answers before the TLS upgrade and such the client would handle them as being trusted. This could be used by a MITM-attacker to inject fake response data.

For Debian 8 jessie, these problems have been fixed in version 7.38.0-4+deb8u22.

We recommend that you upgrade your curl packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/