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Fencer Intel
high 7.5

CVE-2017-9107 json

An issue was discovered in adns before 1.5.2.

published 2020-06-18 6 y ago modified 2026-06-17 4 mo ago also EUVD-2017-18045

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

An issue was discovered in adns before 1.5.2. It overruns reading a buffer if a domain ends with backslash. If the query domain ended with \, and adns_qf_quoteok_query was specified, qdparselabel would read additional bytes from the buffer and try to treat them as the escape sequence. It would depart the input buffer and start processing many bytes of arbitrary heap data as if it were the query domain. Eventually it would run out of input or find some other kind of error, and declare the query domain invalid. But before then it might outrun available memory and crash. In principle this could be a denial of service attack.

Patch / fix

  • gnu adns 1.5.2
  • adns Debian 14, Debian 13, Debian 12 1.6.0-2

debian advisories DEBIAN-CVE-2017-9107

  • adns SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 1.4-75.3.1
  • adns SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +14 more 1.4-103.3.1

suse advisories SUSE-SU-2020:14399-1SUSE-SU-2020:1612-1

  • adns openSUSE Leap 15.1 1.5.1-lp151.3.3.1

opensuse advisories openSUSE-SU-2020:0827-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-9107 updated cvss 7.5

adns: out-of-bounds read when a domain ends with backslash

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.90% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.