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
8.3 High
AI Score
Confidence
Low
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
0.003 Low
EPSS
Percentile
70.4%
Issue Overview:
An issue was found in curl that can cause a buffer overflow in its SOCKS5 proxy communications code.
When curl is using a SOCKS5 proxy and it needs to resolve a hostname to an IP address, its default behavior is to pass the hostname to the proxy and allow it to perform the resolution. In cases where the hostname is greater than 255 characters in length, curl will instead attempt to perform the resolution locally and then pass the resolved IP to the proxy for its use. Due to an issue in the curl source code, the logic that determines whether curl should resolve the name locally or pass it to the proxy for resolution could make an incorrect decision when a slow SOCKS5 handshake occurs. If this occurs, curl may inadvertently copy an excessively long host name, rather than the resolved address, into the target buffer being prepared for transmission to the proxy, resulting in a buffer overflow. (CVE-2023-38545)
An issue was found in libcurl which allows cookies to be inserted into a running program if specific conditions are met. The libcurl provided function, curl_easy_duphandle(), is used to duplicate the easy_handle associated with a transfer. If a duplicated transfer’s easy_handle has cookies enabled when it is duplicated, the cookie-enabled state is cloned but the actual cookies are not. If the source easy_handle didn’t read cookies from disk, the cloned easy_handle will attempt to read cookies from a file named ‘none’ in the local directory, potentially allowing arbitrary cookies to be loaded. (CVE-2023-38546)
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-8.3.0-1.amzn2.0.4.aarch64
libcurl-8.3.0-1.amzn2.0.4.aarch64
libcurl-devel-8.3.0-1.amzn2.0.4.aarch64
curl-debuginfo-8.3.0-1.amzn2.0.4.aarch64
i686:
curl-8.3.0-1.amzn2.0.4.i686
libcurl-8.3.0-1.amzn2.0.4.i686
libcurl-devel-8.3.0-1.amzn2.0.4.i686
curl-debuginfo-8.3.0-1.amzn2.0.4.i686
src:
curl-8.3.0-1.amzn2.0.4.src
x86_64:
curl-8.3.0-1.amzn2.0.4.x86_64
libcurl-8.3.0-1.amzn2.0.4.x86_64
libcurl-devel-8.3.0-1.amzn2.0.4.x86_64
curl-debuginfo-8.3.0-1.amzn2.0.4.x86_64
Red Hat: CVE-2023-38545, CVE-2023-38546
Mitre: CVE-2023-38545, CVE-2023-38546
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | curl | < 8.3.0-1.amzn2.0.4 | curl-8.3.0-1.amzn2.0.4.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libcurl | < 8.3.0-1.amzn2.0.4 | libcurl-8.3.0-1.amzn2.0.4.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libcurl-devel | < 8.3.0-1.amzn2.0.4 | libcurl-devel-8.3.0-1.amzn2.0.4.aarch64.rpm |
Amazon Linux | 2 | aarch64 | curl-debuginfo | < 8.3.0-1.amzn2.0.4 | curl-debuginfo-8.3.0-1.amzn2.0.4.aarch64.rpm |
Amazon Linux | 2 | i686 | curl | < 8.3.0-1.amzn2.0.4 | curl-8.3.0-1.amzn2.0.4.i686.rpm |
Amazon Linux | 2 | i686 | libcurl | < 8.3.0-1.amzn2.0.4 | libcurl-8.3.0-1.amzn2.0.4.i686.rpm |
Amazon Linux | 2 | i686 | libcurl-devel | < 8.3.0-1.amzn2.0.4 | libcurl-devel-8.3.0-1.amzn2.0.4.i686.rpm |
Amazon Linux | 2 | i686 | curl-debuginfo | < 8.3.0-1.amzn2.0.4 | curl-debuginfo-8.3.0-1.amzn2.0.4.i686.rpm |
Amazon Linux | 2 | x86_64 | curl | < 8.3.0-1.amzn2.0.4 | curl-8.3.0-1.amzn2.0.4.x86_64.rpm |
Amazon Linux | 2 | x86_64 | libcurl | < 8.3.0-1.amzn2.0.4 | libcurl-8.3.0-1.amzn2.0.4.x86_64.rpm |
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
8.3 High
AI Score
Confidence
Low
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
0.003 Low
EPSS
Percentile
70.4%