CVE-2024-30156
Varnish Cache before 7.3.2 and 7.4.x before 7.4.3 (and before 6.0.13 LTS), and Varnish Enterprise 6 before 6.0.12r6, allows credits exhaustion for an HTTP/2 connection control flow window, aka a Broke
02 Description
Varnish Cache before 7.3.2 and 7.4.x before 7.4.3 (and before 6.0.13 LTS), and Varnish Enterprise 6 before 6.0.12r6, allows credits exhaustion for an HTTP/2 connection control flow window, aka a Broke
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 3.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.1% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Deferred. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2024-03-24 00:00Z2 YR AGO
- Last updated
- 2024-11-21 19:12Z1 YR AGO
- Reserved
- 2024-03-24
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- Data version
- 5.1
- Document digest
- 60514f3000cc5317a5f16ed5aaf4dd112b911a884643485a47f951d049d0d6bb
05 Affected products
06 References
- varnish-cache.orghttps://varnish-cache.org/security/VSV00014.html
- varnish-cache.orghttps://varnish-cache.org/docs/7.5/whats-new/changes-7.5.html#security
07 Fixed in
AlmaLinux 8
- varnish Fixed in 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1
- varnish-devel Fixed in 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1
- varnish-docs Fixed in 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1
- varnish-modules Fixed
A version is affected if any line below covers it.
- Affected before 0.15.0-6.module_el8.5.0+2620+03a0c2cc
- Affected before 0.15.0-6.module_el8.5.0+76+a10ffa55
- Affected before 0.15.0-6.module_el8.6.0+3089+dac88e97
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- varnish Fixed in 6.6.2-4.el9_3.1
- varnish-devel Fixed in 6.6.2-4.el9_3.1
- varnish-docs Fixed in 6.6.2-4.el9_3.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- varnish Fixed in 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1
- varnish-devel Fixed in 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1
- varnish-docs Fixed in 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1
- varnish-modules Fixed
A version is affected if any line below covers it.
- Affected before 0.15.0-6.module_el8.5.0+2620+03a0c2cc
- Affected before 0.15.0-6.module_el8.5.0+76+a10ffa55
- Affected before 0.15.0-6.module_el8.6.0+3089+dac88e97
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- varnish Fixed in 6.6.2-4.el9_3.1
- varnish-devel Fixed in 6.6.2-4.el9_3.1
- varnish-docs Fixed in 6.6.2-4.el9_3.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- varnish No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- varnish Fixed in 7.5.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- varnish No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- varnish No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.