Debian Security Bug TrackerDEBIANCVE:CVE-2021-3420CVE-2021-3420
7.5 High
CVSS2
Attack Vector
NETWORK
Attack 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
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
0.006 Low
EPSS
Percentile
78.7%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | newlib | <= 3.3.0-1.3 | newlib_3.3.0-1.3_all.deb |
| Debian | 11 | all | newlib | <= 3.3.0-1 | newlib_3.3.0-1_all.deb |
| Debian | 999 | all | newlib | < 4.4.0.20231231-2 | newlib_4.4.0.20231231-2_all.deb |
| Debian | 13 | all | newlib | < 4.4.0.20231231-2 | newlib_4.4.0.20231231-2_all.deb |
| Debian | 12 | all | picolibc | < 1.5-1 | picolibc_1.5-1_all.deb |
| Debian | 11 | all | picolibc | < 1.5-1 | picolibc_1.5-1_all.deb |
| Debian | 999 | all | picolibc | < 1.5-1 | picolibc_1.5-1_all.deb |
| Debian | 13 | all | picolibc | < 1.5-1 | picolibc_1.5-1_all.deb |
Related
7.5 High
CVSS2
Attack Vector
NETWORK
Attack 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
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
0.006 Low
EPSS
Percentile
78.7%