CVE-2020-26160

NameCVE-2020-26160
Descriptionjwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs971556

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
golang-github-dgrijalva-jwt-go (PTS)stretch3.0.0+REALLY.2.6.0-1fixed
buster3.0.0.1+REALLY.2.6.0-3fixed
bullseye, sid3.2.0-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
golang-github-dgrijalva-jwt-gosourcestretch(not affected)
golang-github-dgrijalva-jwt-gosourcebuster(not affected)
golang-github-dgrijalva-jwt-gosource(unstable)3.2.0-3971556

Notes

[buster] - golang-github-dgrijalva-jwt-go <not-affected> (vulnerable code not present until version 3.0.0)
[stretch] - golang-github-dgrijalva-jwt-go <not-affected> (vulnerable code not present until version 3.0.0)
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMDGRIJALVAJWTGO-596515
https://github.com/dgrijalva/jwt-go/issues/422
https://github.com/dgrijalva/jwt-go/pull/286

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