CVE-2021-20210 - Missing Release of Memory after Effective Lifetime

Severity

75%

Complexity

39%

Confidentiality

60%

A flaw was found in Privoxy in versions before 3.0.29. Memory leak in the show-status CGI handler when no filter files are configured can lead to a system crash.

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 7.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C).

Demo Examples

Missing Release of Memory after Effective Lifetime

CWE-401

The following C function leaks a block of allocated memory if the call to read() does not return the expected number of bytes:


               
}

                     
return buf;
return NULL;

                           
return NULL;

Overview

First reported 3 years ago

2021-03-25 19:15:00

Last updated 3 years ago

2021-12-10 21:11:00

Affected Software

Red Hat Enterprise Linux (RHEL) 7.0 (7)

7.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1928729

https://www.privoxy.org/3.0.29/user-manual/whatsnew.html

https://bugzilla.redhat.com/show_bug.cgi?id=1928729

Issue Tracking, Patch, Third Party Advisory

https://www.privoxy.org/3.0.29/user-manual/whatsnew.html

Release Notes, Vendor Advisory

GLSA-202107-16

GLSA-202107-16

Third Party Advisory

Stay updated

ExploitPedia is constantly evolving. Sign up to receive a notification when we release additional functionality.

Get in touch

If you'd like to report a bug or have any suggestions for improvements then please do get in touch with us using this form. We will get back to you as soon as we can.