NA

CVE-2023-38546

Published: 18/10/2023 Updated: 26/01/2024
CVSS v3 Base Score: 3.7 | Impact Score: 1.4 | Exploitability Score: 2.2
VMScore: 0

Vulnerability Summary

This flaw allows an malicious user to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called [curl_easy_duphandle](curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as `none` (using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.

Vulnerability Trend

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haxx libcurl

Vendor Advisories

Two security issues were found in Curl, an easy-to-use client-side URL transfer library and command line tool: CVE-2023-38545 Jay Satiro discovered a buffer overflow in the SOCKS5 proxy handshake CVE-2023-38546 It was discovered that under some circumstances libcurl was susceptible to cookie injection For the oldstable distribution ...
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 ...
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 le ...
Description<!---->A flaw was found in the Curl package This flaw allows an attacker to insert cookies into a running program using libcurl if the specific series of conditions are metA flaw was found in the Curl package This flaw allows an attacker to insert cookies into a running program using libcurl if the specific series of conditions are me ...
On October 11, 2023, cURL released Version 840 of the cURL utility and the libcurl library This release addressed two security vulnerabilities: CVE-2023-38545 - High Security Impact Rating (SIR) CVE-2023-38546 - Low SIR This advisory covers CVE-2023-38545 only For more information about this vulnerability, see the cURL advisory This adviso ...
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A logic flaw has been found in cURL before 840, which allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met ...
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About Apple security updates For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available Recent releases are listed on the&nbsp;Apple security releases page Apple security documents reference vulnerabilities by&nbsp;CVE-ID&nbsp;whe ...
About Apple security updates For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available Recent releases are listed on the&nbsp;Apple security releases page Apple security documents reference vulnerabilities by&nbsp;CVE-ID&nbsp;whe ...
About Apple security updates For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available Recent releases are listed on the&nbsp;Apple security releases page Apple security documents reference vulnerabilities by&nbsp;CVE-ID&nbsp;whe ...

Recent Articles

curl vulnerabilities ironed out with patches after week-long tease
The Register

Topics Security Off-Prem On-Prem Software Offbeat Special Features Vendor Voice Vendor Voice Resources The coordinated disclosure didn’t quite go to plan, though

After a week of rampant speculation about the nature of the security issues in curl, the latest version of the command line transfer tool was finally released today. Described by curl project founder and lead developer Daniel Stenberg as "probably the worst curl security flaw in a long time," the patches address two separate vulnerabilities: CVE-2023-38545 and CVE-2023-38546. We now know the first vulnerability, CVE-2023-38545, is a heap-based buffer overflow flaw that affects both libcurl and t...

Fresh curl tomorrow will patch 'worst' security flaw in ages
The Register

Topics Security Off-Prem On-Prem Software Offbeat Special Features Vendor Voice Vendor Voice Resources It’s bad, folks. Pair of CVEs incoming on October 11

Start your patch engines – a new version of curl is due tomorrow that addresses a pair of flaws, one of which lead developer Daniel Stenberg describes as "probably the worst curl security flaw in a long time." Curl 8.4.0 will hit at around 0600 UTC (0800 CEST, 0700 BST, 0200 EST, 2300 PDT) on October 11 and deal with CVE-2023-38545, which affects both libcurl and the curl tool, and CVE-2023-38546, which only affects libcurl. The release has no API or ABI changes, so the update should slot in w...