Ubuntu.comUB:CVE-2021-3420CVE-2021-3420
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.006 Low
EPSS
Percentile
78.5%
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow
validation in the memory allocation functions mEMALIGn, pvALLOc,
nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow,
leading to an allocation of a small buffer and then to a heap-based buffer
overflow.
Notes
| Author | Note |
|---|---|
| eslerm | fixed for newlib-4.0.0 on 2020-11-17 with aa106b29a (“malloc/nano-malloc: correctly check for out-of-bounds allocation reqs”) |
Related
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.006 Low
EPSS
Percentile
78.5%