CVE-2019-15892
An HTTP/1 parsing failure allows a remote attacker to trigger an assert by sending crafted HTTP/1 requests.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Varnish Cache before 6.0.4 LTS, and 6.1.x and 6.2.x before 6.2.1. An HTTP/1 parsing failure allows a remote attacker to trigger an assert by sending crafted HTTP/1 requests. The assert will cause an automatic restart with a clean cache, which makes it a Denial of Service attack.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.90% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- varnish-software/varnish cache · varnish cache project/varnish cache · debian/debian linux
- Source
- cve@mitre.org
EPSS 5.9% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00069.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00089.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3OEOCYRU43TWEU2C65F3D6GK64MSWNNK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DBAQF6UDRSTURGINIMSMLJR4PTDYWA7C/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KLSF54TDJWJLINIFEW5V5BKDNY5EQRR3/
- https://seclists.org/bugtraq/2019/Sep/5Mailing List, Third Party Advisory
- https://varnish-cache.org/security/VSV00003.htmlVendor Advisory
- https://www.debian.org/security/2019/dsa-4514Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00069.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00089.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3OEOCYRU43TWEU2C65F3D6GK64MSWNNK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DBAQF6UDRSTURGINIMSMLJR4PTDYWA7C/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KLSF54TDJWJLINIFEW5V5BKDNY5EQRR3/
- https://seclists.org/bugtraq/2019/Sep/5Mailing List, Third Party Advisory
- https://varnish-cache.org/security/VSV00003.htmlVendor Advisory
- https://www.debian.org/security/2019/dsa-4514Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.