MGASA-2021-0196
- Source
- https://advisories.mageia.org/MGASA-2021-0196.html
- Import Source
- https://advisories.mageia.org/MGASA-2021-0196.json
- JSON Data
- https://api.osv.dev/v1/vulns/MGASA-2021-0196
- Upstream
- Published
- 2021-04-23T22:53:14Z
- Modified
- 2026-04-16T04:40:38.584210960Z
- Summary
- Updated krb5-appl packages fix security vulnerabilities
- Details
-
An issue was discovered in rcp in MIT krb5-appl through 1.0.3. Due to the rcp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the rcp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious rcp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the rcp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file). This issue is similar to CVE-2019-6111 and CVE-2019-7283 (CVE-2019-25017).
In the rcp client in MIT krb5-appl through 1.0.3 malicious servers could bypass intended access restrictions via the filename of . or an empty filename, similar to CVE-2018-20685 and CVE-2019-7282. The impact is modifying the permissions of the target directory on the client side (CVE-2019-25018).
- References
- Credits
-
-
- Mageia - COORDINATOR
-
Affected packages
Mageia:7 / krb5-appl
Package
- Name
- krb5-appl
- Purl
- pkg:rpm/mageia/krb5-appl?arch=source&distro=mageia-7
Mageia:8 / krb5-appl
Package
- Name
- krb5-appl
- Purl
- pkg:rpm/mageia/krb5-appl?arch=source&distro=mageia-8