Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.3260
curl security update
1 October 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: curl
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22947 CVE-2021-22946
Reference: ESB-2021.3215
ESB-2021.3119.2
Original Bulletin:
https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html
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Debian LTS Advisory DLA-2773-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Thorsten Alteholz
September 30, 2021 https://wiki.debian.org/LTS
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Package : curl
Version : 7.52.1-5+deb9u16
CVE ID : 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 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
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