CVE-2017-9109 An issue was discovered in adns before 1.5.2. It fails to ignore apparent answers before the first RR that was found the first time. when this is fixed, the second answer scan finds the same RRs at th...
CriticalCVSS 9.8
EPSS 2.0%
- Published
- Updated
- Exploit status
- No public exploit known
Description
An issue was discovered in adns before 1.5.2. It fails to ignore apparent answers before the first RR that was found the first time. when this is fixed, the second answer scan finds the same RRs at the first. Otherwise, adns can be confused by interleaving answers for the CNAME target, with the CNAME itself. In that case the answer data structure (on the heap) can be overrun. With this fixed, it prefers to look only at the answer RRs which come after the CNAME, which is at least arguably correct.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/adns(Debian:12) | < 1.6.0-2 | 1.6.0-2 |
| debian/adns(Debian:13) | < 1.6.0-2 | 1.6.0-2 |
| debian/adns(Debian:14) | < 1.6.0-2 | 1.6.0-2 |
| GNU adns | < 1.5.2 | 1.5.2 |
| openSUSE leap | = 15.1 | No fix listed |
| fedoraproject fedora | = 31 | No fix listed |
| fedoraproject fedora | = 32 | No fix listed |
References
- Debian Security Tracker CVE-2017-9109 vendor-advisory
- openSUSE-SU-2020:0827 mailing-list third-party-advisory vendor-advisory
- www.chiark.greenend.org.uk third-party-advisory
- www.chiark.greenend.org.uk
- FEDORA-2020-530188bf36 vendor-advisory
- FEDORA-2020-e59bcaf702 vendor-advisory
- www.chiark.greenend.org.uk release-notes third-party-advisory