Vulnerability identifier: #VU17458
Vulnerability risk: Low
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
libcurl
Universal components / Libraries /
Libraries used by multiple products
Vendor: curl.haxx.se
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information or cause the service to crash.
The vulnerability exists due to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. A remote attacker can trigger heap out-of-bounds read error and read contents of memory on the system or cause the service to crash..
Mitigation
Update to version 7.64.0.
Vulnerable software versions
libcurl: 7.30.0 - 7.63.0
External links
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
http://curl.haxx.se/docs/CVE-2019-3823.html
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. However, proof of concept for this vulnerability is available.