CVE-2018-16840
Description
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-16840
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-16840.html
Vendor advisory: arch — https://security.archlinux.org/ASA-201811-4
Vendor advisory: arch — https://security.archlinux.org/ASA-201811-9
Vendor advisory: arch — https://security.archlinux.org/ASA-201811-8
Vendor advisory: arch — https://security.archlinux.org/ASA-201811-7
Vendor advisory: arch — https://security.archlinux.org/ASA-201811-6
Vendor advisory: arch — https://security.archlinux.org/ASA-201811-5
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 7.62.0-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 7.62.0-1 |
| debian | bullseye | fixed | 7.62.0-1 |
| debian | forky | fixed | 7.62.0-1 |
| debian | sid | fixed | 7.62.0-1 |
| debian | trixie | fixed | 7.62.0-1 |
References
- https://security.archlinux.org/ASA-201811-5
- https://security.archlinux.org/ASA-201811-6
- https://security.archlinux.org/ASA-201811-7
- https://security.archlinux.org/ASA-201811-8
- https://security.archlinux.org/ASA-201811-9
- https://security.archlinux.org/ASA-201811-4
- https://www.suse.com/security/cve/CVE-2018-16840.html
- https://security-tracker.debian.org/tracker/CVE-2018-16840
Verify integrity in audit chain (admin only). AS-IS.