CVE-2021-33197
In Go before 1.15.13 and 1.16.x before 1.16.5, some configurations of ReverseProxy (from net/http/httputil) result in a situation where an attacker is able to drop arbitrary headers.
02 Description
In Go before 1.15.13 and 1.16.x before 1.16.5, some configurations of ReverseProxy (from net/http/httputil) result in a situation where an attacker is able to drop arbitrary headers.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.26% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 82.8% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (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:L/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. 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
- 2021-08-02 18:54Z5 YR AGO
- Last updated
- 2024-08-03 23:42Z2 YR AGO
- Reserved
- 2021-05-19
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 06811c30c545fee3dab58fd2ca28a44fb73f41a35f4d80dff5836d3340ca5309
05 Affected products
06 References
- groups.google.comhttps://groups.google.com/g/golang-announce
- groups.google.comhttps://groups.google.com/g/golang-announce/c/RgCMkAEQjSI
- security.gentoo.orgGLSA-202208-02https://security.gentoo.org/glsa/202208-02
07 Fixed in
AlmaLinux 8
- delve Fixed in 1.6.0-1.module_el8.5.0+2604+960c7771
- grafana Fixed in 7.5.9-4.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- buildah Fixed in 1:1.27.0-2.el9
- buildah-tests Fixed in 1:1.27.0-2.el9
- podman Fixed in 2:4.2.0-3.el9
- podman-docker Fixed in 2:4.2.0-3.el9
- podman-gvproxy Fixed in 2:4.2.0-3.el9
- podman-plugins Fixed in 2:4.2.0-3.el9
- podman-remote Fixed in 2:4.2.0-3.el9
- podman-tests Fixed in 2:4.2.0-3.el9
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- go Fixed in 2:1.16.5-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- delve Fixed in 1.6.0-1.module_el8.5.0+2604+960c7771
- grafana Fixed in 7.5.9-4.el8
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
- buildah Fixed in 1:1.27.0-2.el9
- buildah-tests Fixed in 1:1.27.0-2.el9
- podman Fixed in 2:4.2.0-3.el9
- podman-docker Fixed in 2:4.2.0-3.el9
- podman-gvproxy Fixed in 2:4.2.0-3.el9
- podman-plugins Fixed in 2:4.2.0-3.el9
- podman-remote Fixed in 2:4.2.0-3.el9
- podman-tests Fixed in 2:4.2.0-3.el9
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 11
- golang-1.15 Fixed in 1.15.9-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- golang-1.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- golang-1.16 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- golang-1.16 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.