| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2022-27780 CVE-2022-27781 CVE-2022-27782 |
| CWE-ID | CWE-20 CWE-835 CWE-303 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system curl (Ubuntu package) Operating systems & Components / Operating system package or component libcurl4 (Ubuntu package) Operating systems & Components / Operating system package or component libcurl3-nss (Ubuntu package) Operating systems & Components / Operating system package or component libcurl3-gnutls (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
EUVDB-ID: #VU63007
Risk: Low
CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-27780
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass filters and checks.
The vulnerability exists due to the curl URL parser wrongly accepts percent-encoded URL separators like '/' when decoding the host name part of a URL, making it a different URL using the wrong host name when it is later retrieved. For example, the URL like http://example.com%2F10.0.0.1/, would be allowed by the parser and get transposed into http://example.com/10.0.0.1/.
A remote attacker can bypass various internal filters and checks and force the curl to connect to a wrong web application.
Update the affected package curl to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
curl (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl4 (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl3-nss (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl3-gnutls (Ubuntu package): before 7.58.0-2ubuntu3.18
CPE2.3https://ubuntu.com/security/notices/USN-5412-1
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.
EUVDB-ID: #VU63008
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2022-27781
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop when handling requests with the CURLOPT_CERTINFO option. A remote attacker can consume all available system resources and cause denial of service conditions.
MitigationUpdate the affected package curl to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
curl (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl4 (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl3-nss (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl3-gnutls (Ubuntu package): before 7.58.0-2ubuntu3.18
CPE2.3https://ubuntu.com/security/notices/USN-5412-1
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.
EUVDB-ID: #VU63009
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2022-27782
CWE-ID:
CWE-303 - Incorrect Implementation of Authentication Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the way libcurl handles previously used connections in a connection pool for subsequent transfers. Several TLS and SSH settings were left out from the configuration match checks, resulting in erroneous matches for different resources. As a result, libcurl can send authentication string from one resource to another, exposing credentials to a third-party.
Update the affected package curl to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
curl (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl4 (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl3-nss (Ubuntu package): before 7.58.0-2ubuntu3.18
libcurl3-gnutls (Ubuntu package): before 7.58.0-2ubuntu3.18
CPE2.3https://ubuntu.com/security/notices/USN-5412-1
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.
