Vulnerability Details : CVE-2021-4156
An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.
Exploit prediction scoring system (EPSS) score for CVE-2021-4156
Probability of exploitation activity in the next 30 days: 0.35%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 68 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-4156
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:P |
8.6
|
4.9
|
NIST |
|
7.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |
2.8
|
4.2
|
NIST |
CWE ids for CVE-2021-4156
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2021-4156
-
https://github.com/libsndfile/libsndfile/pull/732/commits/4c30646abf7834e406f7e2429c70bc254e18beab
flac: Fix improper buffer reusing by yuawn · Pull Request #732 · libsndfile/libsndfile · GitHubPatch;Third Party Advisory
-
https://github.com/libsndfile/libsndfile/issues/731
Heap-buffer-overflow in src/flac.c:274:41 in flac_buffer_copy · Issue #731 · libsndfile/libsndfile · GitHubExploit;Issue Tracking;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2027690
2027690 – (CVE-2021-4156) CVE-2021-4156 libsndfile: heap out-of-bounds read in src/flac.c in flac_buffer_copyExploit;Issue Tracking;Third Party Advisory
-
https://security.gentoo.org/glsa/202309-11
libsndfile: Multiple Vulnerabilities (GLSA 202309-11) — Gentoo security
-
https://lists.debian.org/debian-lts-announce/2022/06/msg00020.html
[SECURITY] [DLA 3058-1] libsndfile security updateMailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2022/09/msg00036.html
[SECURITY] [DLA 3126-1] libsndfile security updateMailing List;Third Party Advisory
Products affected by CVE-2021-4156
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:libsndfile_project:libsndfile:1.1.10:*:*:*:*:*:*:*