What is CVE-2019-17502?

CVE-2019-17502 is a high-severity vulnerability in Hydra Project, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-10-12.

How severe is CVE-2019-17502?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2019-17502 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Hydra Project

CVE-2019-17502

Hydra through 0.1.8 has a NULL pointer dereference and daemon crash when processing POST requests that lack a Content-Length header. read.c, request.c, and util.c contribute to this. The process_header_end() function calls boa_atoi(), which ultimately calls atoi() on a NULL pointer.

Published 2019-10-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Hydra Project

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

shrug-security/hydra-0.1.8

References

hydra.hellug.gr (Third Party Advisory)
gist.github.com/fxb6476/0b9883a88ff2ca40de46a8469834e16c (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-17502?: CVE-2019-17502 is a high-severity vulnerability in Hydra Project, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-10-12.
How severe is CVE-2019-17502?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-17502 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.