1. Ubuntu Security Notices
  2. USN-6237-1

USN-6237-1: curl vulnerabilities

Publication date

19 July 2023

Overview

Several security issues were fixed in curl.

Releases

Packages

  • curl - HTTP, HTTPS, and FTP client and client libraries

Details

Hiroki Kurosawa discovered that curl incorrectly handled validating certain
certificate wildcards. A remote attacker could possibly use this issue to
spoof certain website certificates using IDN hosts. (CVE-2023-28321)

Hiroki Kurosawa discovered that curl incorrectly handled callbacks when
certain options are set by applications. This could cause applications
using curl to misbehave, resulting in information disclosure, or a denial
of service. (CVE-2023-28322)

It was discovered that curl incorrectly handled saving cookies to files. A
local attacker could possibly use this issue to create or overwrite files.
This issue only affected Ubuntu 22.10, and Ubuntu 23.04. (CVE-2023-32001)

Hiroki Kurosawa discovered that curl incorrectly handled validating certain
certificate wildcards. A remote attacker could possibly use this issue to
spoof certain website certificates using IDN hosts. (CVE-2023-28321)

Hiroki Kurosawa discovered that curl incorrectly handled callbacks when
certain options are set by applications. This could cause applications
using curl to misbehave, resulting in information disclosure, or a denial
of service. (CVE-2023-28322)

It was discovered that curl incorrectly handled saving cookies to files. A
local attacker could possibly use this issue to create or overwrite files.
This issue only affected Ubuntu 22.10, and Ubuntu 23.04. (CVE-2023-32001)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
23.04 lunar libcurl3-gnutls –  7.88.1-8ubuntu2.1
libcurl3-nss –  7.88.1-8ubuntu2.1
libcurl4 –  7.88.1-8ubuntu2.1
curl –  7.88.1-8ubuntu2.1
22.10 kinetic libcurl3-gnutls –  7.85.0-1ubuntu0.6
libcurl3-nss –  7.85.0-1ubuntu0.6
libcurl4 –  7.85.0-1ubuntu0.6
curl –  7.85.0-1ubuntu0.6
22.04 jammy libcurl3-gnutls –  7.81.0-1ubuntu1.11
libcurl3-nss –  7.81.0-1ubuntu1.11
libcurl4 –  7.81.0-1ubuntu1.11
curl –  7.81.0-1ubuntu1.11
20.04 focal libcurl3-gnutls –  7.68.0-1ubuntu2.19
libcurl3-nss –  7.68.0-1ubuntu2.19
libcurl4 –  7.68.0-1ubuntu2.19
curl –  7.68.0-1ubuntu2.19

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References

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