Vulnerability Details : CVE-2019-20633
GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2019-20633
- cpe:2.3:a:gnu:patch:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-20633
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-20633
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2019-20633
-
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-20633
-
https://savannah.gnu.org/bugs/index.php?56683
GNU patch - Bugs: bug #56683, Double free in pch.c:1187 [Savannah]Exploit;Vendor Advisory
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