CVE-2021-22926
CVSS v3
7.5
HIGH
Score EPSS
9.8 %
probabilité d’exploitation au 2026-10-05
CISA KEV
Non
exploitation connue
Exploitation
—
statut SSVC
Description
libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.
Détails techniques
- Publiée le
- 2021-08-05
Questions fréquentes
Qu’est-ce que CVE-2021-22926 ?
libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.
CVE-2021-22926 est-elle activement exploitée ?
Aucune exploitation active de CVE-2021-22926 n’est confirmée. Son score EPSS était de 9.8 % au 2026-10-05, soit la probabilité estimée d’exploitation dans les 30 prochains jours.
Quel est le score CVSS de CVE-2021-22926 ?
CVE-2021-22926 a un score de base CVSS v3 de 7.5 (gravité HIGH).
CVE-2021-22926 touche-t-elle votre environnement ?
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Autres vulnérabilités 2021 à trier
Classées par probabilité d’exploitation (EPSS).