Multiple vulnerabilities in cURL
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2023-28322 CVE-2023-28321 CVE-2023-28320 CVE-2023-28319 |
| CWE-ID | CWE-440 CWE-295 CWE-662 CWE-416 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
cURL Client/Desktop applications / Other client software |
| Vendor | curl.haxx.se |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Expected behavior violation
EUVDB-ID: #VU76238
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-2023-28322
CWE-ID:
CWE-440 - Expected Behavior Violation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a logic error when sending HTTP POST and PUT requests using the same handle. The libcurl can erroneously use the read callback (CURLOPT_READFUNCTION) to ask for data to send, even when the CURLOPT_POSTFIELDS option has been set, if the same handle previously was used to issue a PUT request which used that callback. As a result, the application can misbehave and either send off the wrong data or use memory after free or similar in the second transfer.
MitigationInstall updates from vendor's website.
Vulnerable software versionscURL: 7.1.1 - 8.0.0
CPE2.3- cpe:2.3:a:curl_haxx_se:curl:7.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.7:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.7.1:*:*:*:*:*:*:*
https://curl.haxx.se/docs/CVE-2023-28322.html
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.
2) Improper certificate validation
EUVDB-ID: #VU76237
Risk: Medium
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2023-28321
CWE-ID:
CWE-295 - Improper Certificate Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to improper certificate validation when matching wildcards in TLS certificates for IDN names. A remote attacker crate a specially crafted certificate that will be considered trusted by the library.
Successful exploitation of the vulnerability requires that curl is built to use OpenSSL, Schannel or Gskit.
MitigationInstall updates from vendor's website.
Vulnerable software versionscURL: 7.12 - 8.0.1
CPE2.3- cpe:2.3:a:curl_haxx_se:curl:7.12:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.12.0:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.12.1:*:*:*:*:*:*:*
https://curl.haxx.se/docs/CVE-2023-28321.html
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.
3) Improper synchronization
EUVDB-ID: #VU76235
Risk: Low
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-28320
CWE-ID:
CWE-662 - Improper Synchronization
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper synchronization when resolving host names using the alarm() and siglongjmp() function. A remote attacker can force the application to crash by influencing contents of the global buffer.
Install updates from vendor's website.
Vulnerable software versionscURL: 7.1.1 - 8.0.1
CPE2.3- cpe:2.3:a:curl_haxx_se:curl:7.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.9.8:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.10:*:*:*:*:*:*:*
https://curl.haxx.se/docs/CVE-2023-28320.html
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.
4) Use-after-free
EUVDB-ID: #VU76233
Risk: Low
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-28319
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a use-after-free error when checking the SSH sha256 fingerprint. A remote attacker can use the application to connect to a malicious SSH server, trigger a use-after-free error and gain access to potentially sensitive information.
Successful exploitation of the vulnerability requires usage of the the CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 option, and also CURLOPT_VERBOSE or CURLOPT_ERRORBUFFER options have to be set.
Install updates from vendor's website.
Vulnerable software versionscURL: 7.81.0 - 8.0.1
CPE2.3- cpe:2.3:a:curl_haxx_se:curl:7.81.0:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.82.0:*:*:*:*:*:*:*
- cpe:2.3:a:curl_haxx_se:curl:7.83.0:*:*:*:*:*:*:*
https://curl.haxx.se/docs/CVE-2023-28319.html
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.
