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amazonAmazonALAS-2024-2543
HistoryMay 09, 2024 - 7:16 p.m.

Medium: cni-plugins

2024-05-0919:16:00
alas.aws.amazon.com
13
malicious http sender
chunk extensions
request manipulation
cni-plugins
security advisory

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

7.1 High

AI Score

Confidence

Low

0.001 Low

EPSS

Percentile

20.4%

Issue Overview:

A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body. A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request. Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small. (CVE-2023-39326)

Affected Packages:

cni-plugins

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update cni-plugins to update your system.

New Packages:

aarch64:  
    cni-plugins-1.2.0-1.amzn2.0.5.aarch64  
    cni-plugins-debuginfo-1.2.0-1.amzn2.0.5.aarch64  
  
src:  
    cni-plugins-1.2.0-1.amzn2.0.5.src  
  
x86_64:  
    cni-plugins-1.2.0-1.amzn2.0.5.x86_64  
    cni-plugins-debuginfo-1.2.0-1.amzn2.0.5.x86_64  

Additional References

Red Hat: CVE-2023-39326

Mitre: CVE-2023-39326

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

7.1 High

AI Score

Confidence

Low

0.001 Low

EPSS

Percentile

20.4%