diff options
Diffstat (limited to 'guix/cve.scm')
| -rw-r--r-- | guix/cve.scm | 79 |
1 files changed, 55 insertions, 24 deletions
diff --git a/guix/cve.scm b/guix/cve.scm index 2167028ede..088e39837a 100644 --- a/guix/cve.scm +++ b/guix/cve.scm @@ -24,6 +24,7 @@ #:use-module (web uri) #:use-module (srfi srfi-1) #:use-module (srfi srfi-9) + #:use-module (srfi srfi-11) #:use-module (srfi srfi-19) #:use-module (srfi srfi-26) #:use-module (ice-9 match) @@ -48,8 +49,8 @@ (define-record-type <vulnerability> (vulnerability id packages) vulnerability? - (id vulnerability-id) - (packages vulnerability-packages)) + (id vulnerability-id) ;string + (packages vulnerability-packages)) ;((p1 v1 v2 v3) (p2 v1) ...) (define %now (current-date)) @@ -93,18 +94,45 @@ (define (cpe->package-name cpe) "Converts the Common Platform Enumeration (CPE) string CPE to a package -name, in a very naive way. Return #f if CPE does not look like an application -CPE string." - (and=> (regexp-exec %cpe-package-rx (string-trim-both cpe)) +name, in a very naive way. Return two values: the package name, and its +version string. Return #f and #f if CPE does not look like an application CPE +string." + (cond ((regexp-exec %cpe-package-rx (string-trim-both cpe)) + => (lambda (matches) - (cons (match:substring matches 2) - (string-append (match:substring matches 3) - (match (match:substring matches 4) - ("" "") - (patch-level - ;; Drop the colon from things like - ;; "cpe:/a:openbsd:openssh:6.8:p1". - (string-drop patch-level 1)))))))) + (values (match:substring matches 2) + (string-append (match:substring matches 3) + (match (match:substring matches 4) + ("" "") + (patch-level + ;; Drop the colon from things like + ;; "cpe:/a:openbsd:openssh:6.8:p1". + (string-drop patch-level 1))))))) + (else + (values #f #f)))) + +(define (cpe->product-alist products) + "Given PRODUCTS, a list of CPE names, return the subset limited to the +applications listed in PRODUCTS, with names converted to package names: + + (cpe->product-alist + '(\"cpe:/a:gnu:libtasn1:4.7\" \"cpe:/a:gnu:libtasn1:4.6\" \"cpe:/a:gnu:cpio:2.11\")) + => ((\"libtasn1\" \"4.7\" \"4.6\") (\"cpio\" \"2.11\")) +" + (fold (lambda (product result) + (let-values (((name version) (cpe->package-name product))) + (if name + (match result + (((previous . versions) . tail) + ;; Attempt to coalesce NAME and PREVIOUS. + (if (string=? name previous) + (alist-cons name (cons version versions) tail) + (alist-cons name (list version) result))) + (() + (alist-cons name (list version) result))) + result))) + '() + (sort products string<?))) (define %parse-vulnerability-feed ;; Parse the XML vulnerability feed from @@ -132,12 +160,12 @@ CPE string." ;; Some entries have no vulnerable-software-list. rest) ((products id . rest) - (match (filter-map cpe->package-name products) + (match (cpe->product-alist products) (() ;; No application among PRODUCTS. rest) (packages - (cons (vulnerability id (reverse packages)) + (cons (vulnerability id packages) rest)))))) (x seed))) @@ -190,7 +218,7 @@ the given TTL (fetch from the NIST web site when TTL has expired)." (with-atomic-file-output cache (lambda (port) (write `(vulnerabilities - 0 ;format version + 1 ;format version ,(map vulnerability->sexp vulns)) port))) vulns)) @@ -206,7 +234,7 @@ the given TTL (fetch from the NIST web site when TTL has expired)." (if (old? cache) (update-cache) (match (call-with-input-file cache read) - (('vulnerabilities 0 vulns) + (('vulnerabilities 1 vulns) (map sexp->vulnerability vulns)) (x (update-cache))))) @@ -233,8 +261,8 @@ published by the US NIST." (define (vulnerabilities->lookup-proc vulnerabilities) "Return a lookup procedure built from VULNERABILITIES that takes a package name and optionally a version number. When the version is omitted, the lookup -procedure returns a list of version/vulnerability pairs; otherwise, it returns -a list of vulnerabilities affection the given package version." +procedure returns a list of vulnerabilities; otherwise, it returns a list of +vulnerabilities affecting the given package version." (define table ;; Map package names to lists of version/vulnerability pairs. (fold (lambda (vuln table) @@ -242,8 +270,8 @@ a list of vulnerabilities affection the given package version." (($ <vulnerability> id packages) (fold (lambda (package table) (match package - ((name . version) - (vhash-cons name (cons version vuln) + ((name . versions) + (vhash-cons name (cons vuln versions) table)))) table packages)))) @@ -254,11 +282,14 @@ a list of vulnerabilities affection the given package version." (vhash-fold* (if version (lambda (pair result) (match pair - ((v . vuln) - (if (string=? v version) + ((vuln . versions) + (if (member version versions) (cons vuln result) result)))) - cons) + (lambda (pair result) + (match pair + ((vuln . _) + (cons vuln result))))) '() package table))) |