Description
An unhandled exception in check_ignored() in apport/report.py can be exploited by a local attacker to cause a denial of service. If the mtime attribute is a string value in apport-ignore.xml, it will trigger an unhandled exception, resulting in a crash. Fixed in 2.20.1-0ubuntu2.24, 2.20.9-0ubuntu7.16, 2.20.11-0ubuntu27.6.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Canonical | apport | 2.20.1 – < 2.20.1-0ubuntu2.24, 2.20.9 – < 2.20.9-0ubuntu7.16, 2.20.11 – < 2.20.11-0ubuntu27.6 | 2.20.1-0ubuntu2.24 |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | apport | 2.20.11-0ubuntu27.6 | USN-4449-1 |
| Ubuntu 18.04 LTS | apport | 2.20.9-0ubuntu7.16 | USN-4449-1 |
| Ubuntu 16.04 LTS | apport | 2.20.1-0ubuntu2.24 | USN-4449-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | apport | 2.14.1-0ubuntu3.29+esm5 | USN-4449-2 |
Advisories 2
- USN-4449-1 apport vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-4449-2 apport vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- https://usn.ubuntu.com/4449-1
- https://launchpad.net/bugs/1877023
- USN-4449-1 vendor-advisory
- USN-4449-2 vendor-advisory