CVE-2021-3520 — Integer Overflow or Wraparound in Project LZ4

CWE-190 — Integer Overflow or WraparoundCWE-787 — Out-of-bounds Write12 documents9 sources
Severity
9.8CRITICALNVD
EPSS
0.1%
top 65.73%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
LZ4 Project LZ4Splunk Universal ForwarderOracle Communications Cloud Native Core Policy+1 more
Timeline
PublishedJun 2
Latest updateSep 1

Description

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages6 packages

▶NVDlz4_project/lz41.8.3 — 1.9.4
▶NVDsplunk/universal_forwarder8.2.0 — 8.2.12+2
▶Debianlz4_project/lz4< 1.9.3-2+3
▶CVEListV5lz4_project/lz4lz4-1.8.3

Patches

Patch: bugzilla.redhat.com ↗Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

6
GHSA
lz4-sys vulnerable to memory corruption via issue in liblz4↗2022-09-01
▶
OSV
lz4-sys vulnerable to memory corruption via issue in liblz4↗2022-09-01
▶
OSV
Memory corruption in liblz4↗2022-08-25
▶
GHSA
GHSA-gmc7-pqv9-966m: There's a flaw in lz4↗2022-05-24
▶
CVEList
CVE-2021-3520: There's a flaw in lz4↗2021-06-02
▶

📋Vendor Advisories

5
Oracle
Oracle Oracle Communications Risk Matrix: Policy (lz4) — CVE-2021-3520↗2022-04-15
▶
Ubuntu
LZ4 vulnerability↗2021-05-31
▶
Ubuntu
LZ4 vulnerability↗2021-05-26
▶
Red Hat
lz4: memory corruption due to an integer overflow bug caused by memmove argument↗2021-04-28
▶
Debian
CVE-2021-3520: lz4 - There's a flaw in lz4. An attacker who submits a crafted file to an application ...↗2021
▶
CVE-2021-3520 — Integer Overflow or Wraparound | cvebase