Description
lestrrat-go/jwx is a Go module implementing various JWx (JWA/JWE/JWK/JWS/JWT, otherwise known as JOSE) technologies. A p2c parameter set too high in JWE's algorithm PBES2-* could lead to a denial of service. The JWE key management algorithms based on PBKDF2 require a JOSE Header Parameter called p2c (PBES2 Count). This parameter dictates the number of PBKDF2 iterations needed to derive a CEK wrapping key. Its primary purpose is to intentionally slow down the key derivation function, making password brute-force and dictionary attacks more resource- intensive. Therefore, if an attacker sets the p2c parameter in JWE to a very large number, it can cause a lot of computational consumption, resulting in a denial of service. This vulnerability has been addressed in commit `64f2a229b` which has been included in release version 1.2.27 and 2.0.18. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| lestrrat-go | jwx | < 1.2.27, >= 2.0.0, < 2.0.18 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | falcoctl | 0.7.1-r1 | — |
| Wolfi rolling | gitsign +2 | 0.8.1-r0 | — |
| Wolfi rolling | kubescape | 3.0.3-r4 | — |
| Wolfi rolling | tekton-chains | 0.19.0-r6 | — |
| Wolfi rolling | vexctl | 0.2.6-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/lestrrat-go/jwx | < 1.2.27 | 1.2.27 | GHSA-7f9x-gw85-8grf |
| Go | github.com/lestrrat-go/jwx/v2 | < 2.0.18 | 2.0.18 | GHSA-7f9x-gw85-8grf |