Debian Security Advisory
DLA-2773-1 curl -- LTS security update
- Date Reported:
- 30 Sep 2021
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2021-22946, CVE-2021-22947.
- More information:
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.
Crafted answers from a server might force clients to not use TLS on connections though TLS was required and expected.
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 9 stretch, these problems have been fixed in version 7.52.1-5+deb9u16.
We recommend that you upgrade your curl packages.
For the detailed security status of curl please refer to its security tracker page at: https://security-tracker.debian.org/tracker/curl
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS