Headline
Ubuntu Security Notice USN-5907-1
Ubuntu Security Notice 5907-1 - It was discovered that c-ares incorrectly handled certain sortlist strings. A remote attacker could use this issue to cause c-ares to crash, resulting in a denial of service, or possibly execute arbitrary code.
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Ubuntu Security Notice USN-5907-1
March 02, 2023
c-ares vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
c-ares could be made to crash or run programs if it processed specially
crafted input.
Software Description:
- c-ares: library for asynchronous name resolution
Details:
It was discovered that c-ares incorrectly handled certain sortlist strings.
A remote attacker could use this issue to cause c-ares to crash, resulting
in a denial of service, or possibly execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.10:
libc-ares2 1.18.1-1ubuntu0.22.10.1
Ubuntu 22.04 LTS:
libc-ares2 1.18.1-1ubuntu0.22.04.1
Ubuntu 20.04 LTS:
libc-ares2 1.15.0-1ubuntu0.2
Ubuntu 18.04 LTS:
libc-ares2 1.14.0-1ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5907-1
CVE-2022-4904
Package Information:
https://launchpad.net/ubuntu/+source/c-ares/1.18.1-1ubuntu0.22.10.1
https://launchpad.net/ubuntu/+source/c-ares/1.18.1-1ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/c-ares/1.15.0-1ubuntu0.2
https://launchpad.net/ubuntu/+source/c-ares/1.14.0-1ubuntu0.2
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A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity.