6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.4 Medium
AI Score
Confidence
Low
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.004 Low
EPSS
Percentile
71.7%
Issue Overview:
A flaw was found in the way curl handled telnet protocol option for sending environment variables, which could lead to sending of uninitialized data from a stack-based buffer to the server. This issue leads to potentially revealing sensitive internal information to the server using a clear-text network protocol. (CVE-2021-22898)
A flaw was found in curl in the way curl handles a file hash mismatch after downloading content using the Metalink feature. This flaw allows malicious actors controlling a hosting server to trick users into downloading malicious content. The highest threat from this vulnerability is to integrity. (CVE-2021-22922)
A flaw was found in curl in the way curl handles credentials when downloading content using the Metalink feature. This flaw allows malicious actors controlling a hosting server to gain access to credentials provided while downloading content without the user’s knowledge. The highest threat from this vulnerability is to confidentiality. (CVE-2021-22923)
A flaw was found in libcurl in the way libcurl handles previously used connections without accounting for ‘issuer cert’ and comparing the involved paths case-insensitively. This flaw allows libcurl to use the wrong connection. The highest threat from this vulnerability is to confidentiality. (CVE-2021-22924)
A flaw was found in the way curl handled telnet protocol option for sending environment variables, which could lead to sending of uninitialized data from a stack-based buffer to the server. This issue leads to potentially revealing sensitive internal information to the server using a clear-text network protocol. (CVE-2021-22925)
Affected Packages:
curl
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 curl to update your system.
New Packages:
aarch64:
curl-7.76.1-7.amzn2.0.2.aarch64
libcurl-7.76.1-7.amzn2.0.2.aarch64
libcurl-devel-7.76.1-7.amzn2.0.2.aarch64
curl-debuginfo-7.76.1-7.amzn2.0.2.aarch64
i686:
curl-7.76.1-7.amzn2.0.2.i686
libcurl-7.76.1-7.amzn2.0.2.i686
libcurl-devel-7.76.1-7.amzn2.0.2.i686
curl-debuginfo-7.76.1-7.amzn2.0.2.i686
src:
curl-7.76.1-7.amzn2.0.2.src
x86_64:
curl-7.76.1-7.amzn2.0.2.x86_64
libcurl-7.76.1-7.amzn2.0.2.x86_64
libcurl-devel-7.76.1-7.amzn2.0.2.x86_64
curl-debuginfo-7.76.1-7.amzn2.0.2.x86_64
Red Hat: CVE-2021-22898, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-22925
Mitre: CVE-2021-22898, CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-22925
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | curl | < 7.76.1-7.amzn2.0.2 | curl-7.76.1-7.amzn2.0.2.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libcurl | < 7.76.1-7.amzn2.0.2 | libcurl-7.76.1-7.amzn2.0.2.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libcurl-devel | < 7.76.1-7.amzn2.0.2 | libcurl-devel-7.76.1-7.amzn2.0.2.aarch64.rpm |
Amazon Linux | 2 | aarch64 | curl-debuginfo | < 7.76.1-7.amzn2.0.2 | curl-debuginfo-7.76.1-7.amzn2.0.2.aarch64.rpm |
Amazon Linux | 2 | i686 | curl | < 7.76.1-7.amzn2.0.2 | curl-7.76.1-7.amzn2.0.2.i686.rpm |
Amazon Linux | 2 | i686 | libcurl | < 7.76.1-7.amzn2.0.2 | libcurl-7.76.1-7.amzn2.0.2.i686.rpm |
Amazon Linux | 2 | i686 | libcurl-devel | < 7.76.1-7.amzn2.0.2 | libcurl-devel-7.76.1-7.amzn2.0.2.i686.rpm |
Amazon Linux | 2 | i686 | curl-debuginfo | < 7.76.1-7.amzn2.0.2 | curl-debuginfo-7.76.1-7.amzn2.0.2.i686.rpm |
Amazon Linux | 2 | x86_64 | curl | < 7.76.1-7.amzn2.0.2 | curl-7.76.1-7.amzn2.0.2.x86_64.rpm |
Amazon Linux | 2 | x86_64 | libcurl | < 7.76.1-7.amzn2.0.2 | libcurl-7.76.1-7.amzn2.0.2.x86_64.rpm |
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.4 Medium
AI Score
Confidence
Low
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.004 Low
EPSS
Percentile
71.7%