High severity · published Oct 14, 2019
CVE-2019-17543
LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize), affecting applications that call LZ4_compress_fast with a large input
8.1
CVSS
10.5%
EPSS
No
On KEV
Description
LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize), affecting applications that call LZ4_compress_fast with a large input. (This issue can also lead to data corruption.) NOTE: the vendor states "only a few specific / uncommon usages of the API are at risk."
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)10.5% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LZ
Lz4 · Lz4 Project
before 1.9.2 · source: NVD
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-17543
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-17543
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00069.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00070.html
Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15941
Third Party Advisory
https://github.com/lz4/lz4/compare/v1.9.1...v1.9.2
Third Party Advisory
https://github.com/lz4/lz4/issues/801
Patch
https://github.com/lz4/lz4/pull/756
More from Lz4
9.8
CVE-2021-3520
There's a flaw in lz4