ELOG 3.1.4-57bea22 and below is affected by a denial of service vulnerability due to a use after free. A remote unauthenticated attacker can crash the ELOG server by sending multiple HTTP POST requests which causes the ELOG function retrieve_url() to use a freed variable.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Elog | Elog_project | * | 3.1.4-57bea22 (including) |
| Elog | Ubuntu | bionic | * |
| Elog | Ubuntu | disco | * |
| Elog | Ubuntu | eoan | * |
| Elog | Ubuntu | focal | * |
| Elog | Ubuntu | groovy | * |
| Elog | Ubuntu | hirsute | * |
| Elog | Ubuntu | impish | * |
| Elog | Ubuntu | trusty | * |
| Elog | Ubuntu | xenial | * |
Potential Mitigations
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2IN3FP6VXYSD4OMUCFZNOL7MKPWRQFAL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4IAS4HI24H2ERKBZTDEVJ3LEQEFWYSCT/
- https://www.tenable.com/security/research/tra-2019-53
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2IN3FP6VXYSD4OMUCFZNOL7MKPWRQFAL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4IAS4HI24H2ERKBZTDEVJ3LEQEFWYSCT/
- https://www.tenable.com/security/research/tra-2019-53