cbcvebase.
CVE-2019-8442
published 2019-05-22

CVE-2019-8442: The CachingResourceDownloadRewriteRule class in Jira before version 7.13.4, and from version 8.0.0 before version 8.0.4, and from version 8.1.0 before version…

PriorityP182high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
59.83%
99.0th percentile
The CachingResourceDownloadRewriteRule class in Jira before version 7.13.4, and from version 8.0.0 before version 8.0.4, and from version 8.1.0 before version 8.1.1 allows remote attackers to access files in the Jira webroot under the META-INF directory via a lax path access check.

Affected

8 ranges
VendorProductVersion rangeFixed in
atlassianjira< 7.13.47.13.4
atlassianjira>= 8.0.0 < unspecifiedunspecified
atlassianjira>= 8.1.0 < unspecifiedunspecified
atlassianjira>= unspecified < 7.13.47.13.4
atlassianjira>= unspecified < 8.0.48.0.4
atlassianjira>= unspecified < 8.1.18.1.1
atlassianjira_server>= 8.0.0 < 8.0.48.0.4
atlassianjira_server>= 8.1.0 < 8.1.18.1.1

Detection & IOCsextracted from sources · hover to see the quote

url/s/{{randstr}}/_/WEB-INF/classes/META-INF/maven/com.atlassian.jira/jira-core/pom.xml
url/s/{{randstr}}/_/META-INF/maven/com.atlassian.jira/atlassian-jira-webapp/pom.xml
urlhttps://sim.starbucks.com/s/thiscanbeanythingyouwant/_/META-INF/maven/com.atlassian.jira/atlassian-jira-webapp/pom.xml
path/s/<any>/_/META-INF/maven/com.atlassian.jira/atlassian-jira-webapp/pom.xml
path/s/<any>/_/WEB-INF/classes/META-INF/maven/com.atlassian.jira/jira-core/pom.xml
  • HTTP GET request to the Jira static resource path pattern /s/<arbitrary_string>/_/META-INF/... or /s/<arbitrary_string>/_/WEB-INF/... returning HTTP 200 with body containing 'com.atlassian.jira' indicates successful LFI exploitation via CachingResourceDownloadRewriteRule.
  • The path segment between /s/ and /_/ can be any arbitrary string (e.g. 'thiscanbeanythingyouwant'), as the CachingResourceDownloadRewriteRule performs a lax path check — monitor for requests matching the regex /s/[^/]+/_/(META-INF|WEB-INF)/.
  • Shodan queries 'http.component:"Atlassian Jira"' and 'cpe:"cpe:2.3:a:atlassian:jira"' can be used to identify exposed Jira instances for proactive scanning.
  • The vulnerability is unauthenticated (PR:N, UI:N) — no session or credentials are required; any GET request to the exploit path from an unauthenticated source should be treated as suspicious.
  • ·Affected versions are Jira < 7.13.4, 8.0.0 <= version < 8.0.4, and 8.1.0 <= version < 8.1.1. Instances outside these ranges are not vulnerable.
  • ·The vulnerable class is specifically CachingResourceDownloadRewriteRule; the lax check only exposes files under the META-INF (and WEB-INF/classes/META-INF) directories of the Jira webroot, not arbitrary filesystem paths.
  • ·The Nuclei template is tagged 'intrusive' — active probing with this template against production systems may generate real exploit traffic and should be used only in authorized testing contexts.

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
vulncheck7.5HIGH
CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.