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AUSCERT External Security Bulletin Redistribution
ESB-2021.1118
USN-4898-1: curl vulnerabilities
1 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: curl
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Provide Misleading Information -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22890 CVE-2021-22876
Reference: ESB-2021.1114
Original Bulletin:
https://ubuntu.com/security/notices/USN-4898-1
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USN-4898-1: curl vulnerabilities
31 March 2021
curl could be made to expose sensitive information over the network.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o curl - HTTP, HTTPS, and FTP client and client libraries
Details
Viktor Szakats discovered that curl did not strip off user credentials
from referrer header fields. A remote attacker could possibly use this
issue to obtain sensitive information. ( CVE-2021-22876 )
Mingtao Yang discovered that curl incorrectly handled session tickets when
using an HTTPS proxy. A remote attacker in control of an HTTPS proxy could
use this issue to bypass certificate checks and intercept communications.
This issue only affected Ubuntu 20.04 LTS and Ubuntu 20.10.
( CVE-2021-22890 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o libcurl3-nss - 7.68.0-1ubuntu4.3
o curl - 7.68.0-1ubuntu4.3
o libcurl3-gnutls - 7.68.0-1ubuntu4.3
o libcurl4 - 7.68.0-1ubuntu4.3
Ubuntu 20.04
o libcurl3-nss - 7.68.0-1ubuntu2.5
o curl - 7.68.0-1ubuntu2.5
o libcurl3-gnutls - 7.68.0-1ubuntu2.5
o libcurl4 - 7.68.0-1ubuntu2.5
Ubuntu 18.04
o libcurl3-nss - 7.58.0-2ubuntu3.13
o curl - 7.58.0-2ubuntu3.13
o libcurl3-gnutls - 7.58.0-2ubuntu3.13
o libcurl4 - 7.58.0-2ubuntu3.13
Ubuntu 16.04
o libcurl3-nss - 7.47.0-1ubuntu2.19
o curl - 7.47.0-1ubuntu2.19
o libcurl3-gnutls - 7.47.0-1ubuntu2.19
o libcurl3 - 7.47.0-1ubuntu2.19
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-22890
o CVE-2021-22876
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