Double Free Affecting curl package, versions [7.73.0,7.79.0)


Severity

Recommended
0.0
critical
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.44% (75th percentile)

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  • Snyk IDSNYK-UNMANAGED-CURL-2317564
  • published14 Dec 2021
  • disclosed23 Sept 2021
  • creditz2_

Introduced: 23 Sep 2021

CVE-2021-22945  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade curl to version 7.79.0 or higher.

Overview

curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP. libcurl offers a myriad of powerful features.

Affected versions of this package are vulnerable to Double Free. When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it again.

CVSS Scores

version 3.1