Vulnerability Details : CVE-2020-21674
Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2020-21674
- cpe:2.3:a:libarchive:libarchive:3.4.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-21674
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-21674
| 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 | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2020-21674
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-21674
-
https://github.com/libarchive/libarchive/issues/1298
Heap-buffer-overflow in archive_string_append_from_wcs() (archive_string.c) · Issue #1298 · libarchive/libarchive · GitHubThird Party Advisory
-
https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4
Fix a possible heap-buffer-overflow in archive_string_append_from_wcs() · libarchive/libarchive@4f085ee · GitHubPatch;Third Party Advisory
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