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
0.007 Low
EPSS
Percentile
79.3%
Package : klibc
Version : 2.0.4-9+deb9u1
CVE ID : CVE-2021-31870 CVE-2021-31871 CVE-2021-31872 CVE-2021-31873
Debian Bug : 989505
Several vulnerabilities have been discovered in klibc. Depending on
how klibc is used, these could lead to the execution of arbitrary
code, privilege escalation, or denial of service.
Thanks to Microsoft Vulnerability Research for reporting the heap bugs
and going some of the way to identifying the cpio bugs.
CVE-2021-31870
Multiplication in the calloc() function may result in an integer
overflow and a subsequent heap buffer overflow.
CVE-2021-31871
An integer overflow in the cpio command may result in a NULL
pointer dereference.
CVE-2021-31872
Multiple possible integer overflows in the cpio command on 32-bit
systems may result in a buffer overflow or other security impact.
CVE-2021-31873
Additions in malloc() function may result in integer overflow and
subsequent heap buffer overflow.
For Debian 9 stretch, these problems have been fixed in version
2.0.4-9+deb9u1.
We recommend that you upgrade your klibc packages.
For the detailed security status of klibc please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/klibc
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
–
Ben Hutchings - Debian developer, member of kernel, installer and LTS teams
Attachment:
signature.asc
Description: PGP signature
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 10 | mipsel | libklibc-dbgsym | < 2.0.6-1+deb10u1 | libklibc-dbgsym_2.0.6-1+deb10u1_mipsel.deb |
Debian | 9 | armhf | klibc-utils | < 2.0.4-9+deb9u1 | klibc-utils_2.0.4-9+deb9u1_armhf.deb |
Debian | 10 | amd64 | libklibc | < 2.0.6-1+deb10u1 | libklibc_2.0.6-1+deb10u1_amd64.deb |
Debian | 10 | mips64el | libklibc-dev | < 2.0.6-1+deb10u1 | libklibc-dev_2.0.6-1+deb10u1_mips64el.deb |
Debian | 9 | arm64 | klibc-utils | < 2.0.4-9+deb9u1 | klibc-utils_2.0.4-9+deb9u1_arm64.deb |
Debian | 9 | arm64 | libklibc-dev | < 2.0.4-9+deb9u1 | libklibc-dev_2.0.4-9+deb9u1_arm64.deb |
Debian | 10 | i386 | klibc-utils | < 2.0.6-1+deb10u1 | klibc-utils_2.0.6-1+deb10u1_i386.deb |
Debian | 10 | i386 | libklibc-dev | < 2.0.6-1+deb10u1 | libklibc-dev_2.0.6-1+deb10u1_i386.deb |
Debian | 10 | armel | libklibc-dbgsym | < 2.0.6-1+deb10u1 | libklibc-dbgsym_2.0.6-1+deb10u1_armel.deb |
Debian | 9 | i386 | klibc-utils | < 2.0.4-9+deb9u1 | klibc-utils_2.0.4-9+deb9u1_i386.deb |
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
0.007 Low
EPSS
Percentile
79.3%