Vulnerability Details : CVE-2021-0262
Through routine static code analysis of the Juniper Networks Junos OS software codebase, the Secure Development Life Cycle team identified a Use After Free vulnerability in PFE packet processing on the QFX10002-60C switching platform. Exploitation of this vulnerability may allow a logically adjacent attacker to trigger a Denial of Service (DoS). Continued exploitation of this vulnerability will sustain the Denial of Service (DoS) condition. This issue only affects QFX10002-60C devices. No other product or platform is vulnerable to this issue. This issue affects Juniper Networks Junos OS on QFX10002-60C: 19.1 version 19.1R3-S1 and later versions; 19.1 versions prior to 19.1R3-S3; 19.2 version 19.2R2 and later versions; 19.2 versions prior to 19.2R3-S1; 20.2 versions prior to 20.2R1-S2. This issue does not affect Juniper Networks Junos OS: versions prior to 19.1R3; 19.2 versions prior to 19.2R2; any version of 19.3; version 20.2R2 and later releases.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2021-0262
- cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.1:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-0262
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-0262
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.3
|
LOW | AV:A/AC:L/Au:N/C:N/I:N/A:P |
6.5
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
Juniper Networks, Inc. |
CWE ids for CVE-2021-0262
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by:
- nvd@nist.gov (Primary)
- sirt@juniper.net (Secondary)
References for CVE-2021-0262
-
https://kb.juniper.net/JSA11153
2021-04 Security Bulletin: Junos OS: QFX10002-60C: Use after free vulnerability found during static code analysis (CVE-2021-0262) - Juniper NetworksVendor Advisory
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