CVE-2017-9788
Publication date 13 July 2017
Last updated 25 August 2025
Ubuntu priority
Description
In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. Providing an initial key with no '=' assignment could reflect the stale value of uninitialized pool memory used by the prior request, leading to leakage of potentially confidential information, and a segfault in other cases resulting in denial of service.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| apache2 | ||
| 16.04 LTS xenial |
Fixed 2.4.18-2ubuntu3.4
|
|
| 14.04 LTS trusty |
Fixed 2.4.7-1ubuntu4.17
|
Patch details
| Package | Patch details |
|---|---|
| apache2 |
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
9.1 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3370-2
- Apache HTTP Server vulnerability
- 1 August 2017
- USN-3370-1
- Apache HTTP Server vulnerability
- 27 July 2017