Ubuntu update for curl

1) Comparison using wrong factors

EUVDB-ID: #VU99865

Risk: Low

CVSSv4.0: 0.2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-9681

CWE-ID: CWE-1025 - Comparison using wrong factors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to an error in HSTS cache implementation. When curl is asked to use HSTS, the expiry time for a subdomain can overwrite a parent domain's cache entry, making it end sooner or later than otherwise intended. This can lead to situations when the website becomes unavailable or force the client to switch to HTTP from HTTP connection earlier than intended.

Mitigation

Update the affected package curl to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 24.10

libcurl4 (Ubuntu package): before 7.81.0-1ubuntu1.19

libcurl3-nss (Ubuntu package): before 7.81.0-1ubuntu1.19

libcurl3-gnutls (Ubuntu package): before 7.81.0-1ubuntu1.19

libcurl4t64 (Ubuntu package): before 8.5.0-2ubuntu10.5

libcurl3t64-gnutls (Ubuntu package): before 8.5.0-2ubuntu10.5

curl (Ubuntu package): before 7.81.0-1ubuntu1.19

CPE2.3

• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.10:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:libcurl4_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libcurl3-nss_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libcurl3-gnutls_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libcurl4t64_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libcurl3t64-gnutls_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:curl_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-7104-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.