Multiple vulnerabilities in cURL



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-5481
CVE-2019-5482
CWE-ID CWE-415
CWE-122
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 2 vulnerabilities.

1) Double Free

EUVDB-ID: #VU21058

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-5481

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing very large blocks during Kerberos FTP data transfer. A remote attacker that controls malicious FTP server can send large blocks of data to the curl client, trigger a double-free error and crash the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

cURL: 7.52.0 - 7.65.3

CPE2.3 External links

https://curl.haxx.se/docs/CVE-2019-5481.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) Heap-based buffer overflow

EUVDB-ID: #VU21059

Risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-5482

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the tftp_receive_packet() function when processing TFTP data. A remote attacker can send specially crafted TFTP response to the vulnerable curl client, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

cURL: 7.19.4 - 7.65.3

CPE2.3 External links

https://curl.haxx.se/docs/CVE-2019-5482.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.



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