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erik-krogherik-krogh
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Merge pull request #14666 from am0o0/amammad-js-hardcodedJWTKey
JS: Extends CredentialsNode class mostly related to JWT authentication packages
2 parents 2d3d46e + b64cb4d commit 41506fb

8 files changed

Lines changed: 434 additions & 5 deletions

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‎javascript/ql/lib/semmle/javascript/frameworks/Credentials.qll‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -12,7 +12,7 @@ import javascript
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abstract class CredentialsNode extends DataFlow::Node {
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/**
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* Gets a description of the kind of credential this expression is used as,
15-
* such as `"user name"`, `"password"`, `"key"`.
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* such as `"user name"`, `"password"`, `"key"`, `"jwt key"`.
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*/
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abstract string getCredentialsKind();
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}

‎javascript/ql/lib/semmle/javascript/frameworks/JWT.qll‎

Lines changed: 103 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -40,11 +40,111 @@ private module JsonWebToken {
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}
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4242
/**
43-
* The private key for a JWT as a `CredentialsNode`.
43+
* The secret or PrivateKey for a JWT as a `CredentialsNode`.
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*/
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private class JwtKey extends CredentialsNode {
46-
JwtKey() { this = DataFlow::moduleMember("jsonwebtoken", "sign").getACall().getArgument(1) }
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JwtKey() {
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this =
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API::moduleImport("jsonwebtoken").getMember(["sign", "verify"]).getParameter(1).asSink()
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}
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override string getCredentialsKind() { result = "jwt key" }
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}
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}
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/**
56+
* Provides classes and predicates modeling the `jose` library.
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*/
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private module Jose {
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/**
60+
* The asymmetric key or symmetric secret for verifying a JWT as a `CredentialsNode`.
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*/
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private class JwtVerifyKey extends CredentialsNode {
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JwtVerifyKey() {
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this = API::moduleImport("jose").getMember("jwtVerify").getParameter(1).asSink()
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}
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override string getCredentialsKind() { result = "jwt key" }
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}
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}
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/**
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* Provides classes and predicates modeling the `jwt-simple` library.
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*/
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private module JwtSimple {
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/**
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* The asymmetric key or symmetric secret for a JWT as a `CredentialsNode`.
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*/
78+
private class JwtKey extends CredentialsNode {
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JwtKey() { this = API::moduleImport("jwt-simple").getMember("decode").getParameter(1).asSink() }
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81+
override string getCredentialsKind() { result = "jwt key" }
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}
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}
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/**
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* Provides classes and predicates modeling the `koa-jwt` library.
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*/
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private module KoaJwt {
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/**
90+
* The shared secret for a JWT as a `CredentialsNode`.
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*/
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private class SharedSecret extends CredentialsNode {
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SharedSecret() {
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this = API::moduleImport("koa-jwt").getParameter(0).getMember("secret").asSink()
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}
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override string getCredentialsKind() { result = "jwt key" }
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}
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}
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/**
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* Provides classes and predicates modeling the `express-jwt` library.
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*/
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private module ExpressJwt {
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/**
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* The shared secret for a JWT as a `CredentialsNode`.
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*/
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private class SharedSecret extends CredentialsNode {
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SharedSecret() {
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this =
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API::moduleImport("express-jwt")
112+
.getMember("expressjwt")
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.getParameter(0)
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.getMember("secret")
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.asSink()
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}
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118+
override string getCredentialsKind() { result = "jwt key" }
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}
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}
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/**
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* Provides classes and predicates modeling the `passport-jwt` library.
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*/
125+
private module PassportJwt {
126+
/**
127+
* The secret (symmetric) or PEM-encoded public key (asymmetric) for a JWT as a `CredentialsNode`.
128+
*/
129+
private class JwtKey extends CredentialsNode {
130+
JwtKey() {
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this =
132+
API::moduleImport("passport-jwt")
133+
.getMember("Strategy")
134+
.getParameter(0)
135+
.getMember("secretOrKey")
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.asSink()
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or
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this =
139+
API::moduleImport("passport-jwt")
140+
.getMember("Strategy")
141+
.getParameter(0)
142+
.getMember("secretOrKeyProvider")
143+
.getParameter(2)
144+
.getParameter(1)
145+
.asSink()
146+
}
47147

48-
override string getCredentialsKind() { result = "key" }
148+
override string getCredentialsKind() { result = "jwt key" }
49149
}
50150
}

‎javascript/ql/lib/semmle/javascript/frameworks/Next.qll‎

Lines changed: 16 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -255,4 +255,20 @@ module NextJS {
255255
.getMember("router")
256256
.asSource()
257257
}
258+
259+
/**
260+
* Provides classes and predicates modeling the `next-auth` library.
261+
*/
262+
private module NextAuth {
263+
/**
264+
* A random string used to hash tokens, sign cookies and generate cryptographic keys as a `CredentialsNode`.
265+
*/
266+
private class SecretKey extends CredentialsNode {
267+
SecretKey() {
268+
this = API::moduleImport("next-auth").getParameter(0).getMember("secret").asSink()
269+
}
270+
271+
override string getCredentialsKind() { result = "jwt key" }
272+
}
273+
}
258274
}

‎javascript/ql/lib/semmle/javascript/security/dataflow/HardcodedCredentialsCustomizations.qll‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,7 @@
44
* own.
55
*/
66

7+
import semmle.javascript.filters.ClassifyFiles
78
import javascript
89
private import semmle.javascript.security.SensitiveActions
910

@@ -38,5 +39,9 @@ module HardcodedCredentials {
3839
*/
3940
class DefaultCredentialsSink extends Sink instanceof CredentialsNode {
4041
override string getKind() { result = super.getCredentialsKind() }
42+
43+
DefaultCredentialsSink() {
44+
not (super.getCredentialsKind() = "jwt key" and isTestFile(this.getFile()))
45+
}
4146
}
4247
}

‎javascript/ql/lib/semmle/javascript/security/dataflow/HardcodedCredentialsQuery.qll‎

Lines changed: 38 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -35,5 +35,43 @@ class Configuration extends DataFlow::Configuration {
3535
trg = bufferFrom and
3636
src = bufferFrom.getArgument(0)
3737
)
38+
or
39+
exists(API::Node n |
40+
n = API::moduleImport("jose").getMember(["importSPKI", "importPKCS8", "importX509"])
41+
|
42+
src = n.getACall().getArgument(0) and
43+
trg = n.getReturn().getPromised().asSource()
44+
)
45+
or
46+
exists(API::Node n |
47+
n = API::moduleImport("jose").getMember(["importSPKI", "importPKCS8", "importX509"])
48+
|
49+
src = n.getACall().getArgument(0) and
50+
trg = n.getReturn().getPromised().asSource()
51+
)
52+
or
53+
exists(API::Node n | n = API::moduleImport("jose").getMember("importJWK") |
54+
src = n.getParameter(0).getMember(["x", "y", "n"]).asSink() and
55+
trg = n.getReturn().getPromised().asSource()
56+
)
57+
or
58+
exists(DataFlow::CallNode n |
59+
n = DataFlow::globalVarRef("TextEncoder").getAnInstantiation().getAMemberCall("encode")
60+
|
61+
src = n.getArgument(0) and
62+
trg = n
63+
)
64+
or
65+
exists(DataFlow::CallNode n | n = DataFlow::globalVarRef("Buffer").getAMemberCall("from") |
66+
src = n.getArgument(0) and
67+
trg = [n, n.getAChainedMethodCall(["toString", "toJSON"])]
68+
)
69+
or
70+
exists(API::Node n |
71+
n = API::moduleImport("jose").getMember("base64url").getMember(["decode", "encode"])
72+
|
73+
src = n.getACall().getArgument(0) and
74+
trg = n.getACall()
75+
)
3876
}
3977
}

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