crítica
CVE-2021-31535
libX11: missing request length checks
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.
Severidad por fuente
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Julia9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, Julia. Más baja según Red Hat (alta), Amazon (alta), AlmaLinux (media), Oracle (media), Rocky Linux (media), Ubuntu (media).
Descripción
LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| julia::Julia Ecosystem Security Advisories | Xorg_libX11_jll | 1.8.6+0 |
| alma 8 | libX11, libX11-common, libX11-devel y 1 más | 1.6.8-5.el8 |
| alpine 3.10 | libx11 | 1.6.12-r1 |
| alpine 3.11 | libx11 | 1.6.12-r1 |
| alpine 3.12 | libx11 | 1.6.12-r1 |
| alpine 3.13 | libx11 | 1.7.1-r0 |
| alpine 3.14 | libx11 | 1.7.1-r0 |
| alpine 3.15 | libx11 | 1.7.1-r0 |
| alpine 3.16 | libx11 | 1.7.1-r0 |
| alpine 3.17 | libx11 | 1.7.1-r0 |
| alpine 3.18 | libx11 | 1.7.1-r0 |
| alpine 3.19 | libx11 | 1.7.1-r0 |
Mostrar las 60 entradas de 41 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| julia::Julia Ecosystem Security Advisories | Xorg_libX11_jll | 1.8.6+0 |
| alma 8 | libX11 | 1.6.8-5.el8 |
| alma 8 | libX11-common | 1.6.8-5.el8 |
| alma 8 | libX11-devel | 1.6.8-5.el8 |
| alma 8 | libX11-xcb | 1.6.8-5.el8 |
| alpine 3.10 | libx11 | 1.6.12-r1 |
| alpine 3.11 | libx11 | 1.6.12-r1 |
| alpine 3.12 | libx11 | 1.6.12-r1 |
| alpine 3.13 | libx11 | 1.7.1-r0 |
| alpine 3.14 | libx11 | 1.7.1-r0 |
| alpine 3.15 | libx11 | 1.7.1-r0 |
| alpine 3.16 | libx11 | 1.7.1-r0 |
| alpine 3.17 | libx11 | 1.7.1-r0 |
| alpine 3.18 | libx11 | 1.7.1-r0 |
| alpine 3.19 | libx11 | 1.7.1-r0 |
| alpine 3.20 | libx11 | 1.7.1-r0 |
| alpine 3.21 | libx11 | 1.7.1-r0 |
| alpine 3.22 | libx11 | 1.7.1-r0 |
| alpine 3.23 | libx11 | 1.7.1-r0 |
| alpine 3.24 | libx11 | 1.7.1-r0 |
| alpine edge | libx11 | 1.7.1-r0 |
| amazon linux 1 | libX11 | 1.6.0-2.2.14.amzn1 |
| amazon linux 1 | libX11-common | 1.6.0-2.2.14.amzn1 |
| amazon linux 1 | libX11-debuginfo | 1.6.0-2.2.14.amzn1 |
| amazon linux 1 | libX11-devel | 1.6.0-2.2.14.amzn1 |
| amazon linux 2 | libX11 | 1.6.7-3.amzn2.0.2 |
| amazon linux 2 | libX11-common | 1.6.7-3.amzn2.0.2 |
| amazon linux 2 | libX11-debuginfo | 1.6.7-3.amzn2.0.2 |
| amazon linux 2 | libX11-devel | 1.6.7-3.amzn2.0.2 |
| debian 10 | libx11 | 2:1.6.7-1+deb10u2 |
| debian 11 | libx11 | 2:1.7.1-1 |
| debian 12 | libx11 | 2:1.7.1-1 |
| debian 13 | libx11 | 2:1.7.1-1 |
| debian 14 | libx11 | 2:1.7.1-1 |
| debian 9 | libx11 | 2:1.6.4-3+deb9u4 |
| echo | libx11 | 2:1.7.1-1 |
| Oracle Linux 7 | libX11 | 1.6.7-4.el7_9 |
| Oracle Linux 7 | libX11-common | 1.6.7-4.el7_9 |
| Oracle Linux 7 | libX11-devel | 1.6.7-4.el7_9 |
| Oracle Linux 8 | libX11 | 1.6.8-5.el8 |
| Oracle Linux 8 | libX11-common | 1.6.8-5.el8 |
| Oracle Linux 8 | libX11-devel | 1.6.8-5.el8 |
| Oracle Linux 8 | libX11-xcb | 1.6.8-5.el8 |
| Red Hat | libX11 | sin corrección indicada |
| Red Hat | libX11-common | sin corrección indicada |
| Red Hat | libX11-devel | sin corrección indicada |
| rocky 8 | libX11 | 1.6.8-5.el8 |
| rocky 8 | libX11-common | 1.6.8-5.el8 |
| rocky 8 | libX11-devel | 1.6.8-5.el8 |
| rocky 8 | libX11-xcb | 1.6.8-5.el8 |
| ubuntu 14.04-ESM | libx11 | 2:1.6.2-1ubuntu2.1+esm2 |
| ubuntu 16.04-ESM | libx11 | 2:1.6.3-1ubuntu2.2+esm1 |
| ubuntu 18.04 | libx11 | 2:1.6.4-3ubuntu0.4 |
| ubuntu 18.04-ESM | libx11 | 2:1.6.4-3ubuntu0.4 |
| ubuntu 20.04 | libx11 | 2:1.6.9-2ubuntu1.2 |
| ubuntu 20.04-ESM | libx11 | 2:1.6.9-2ubuntu1.2 |
| ubuntu 20.10 | libx11 | 2:1.6.12-1ubuntu0.1 |
| ubuntu 21.04 | libx11 | 2:1.7.0-2ubuntu0.1 |
| ubuntu 21.10 | libx11 | 1.7.0-2ubuntu1 |
| ubuntu 22.04 | libx11 | 1.7.0-2ubuntu1 |
Referencias
- http://packetstormsecurity.com/files/162737/libX11-Insufficient-Length-Check-Injection.html
- http://seclists.org/fulldisclosure/2021/May/52
- http://www.openwall.com/lists/oss-security/2021/05/18/2
- https://access.redhat.com/security/cve/CVE-2021-31535
- https://bugzilla.redhat.com/show_bug.cgi?id=1961822
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31535
- https://errata.almalinux.org/8/ALSA-2021-4326.html
- https://errata.rockylinux.org/RLSA-2021:4326
Las 30 referencias
- https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/8d2e02ae650f00c4a53deb625211a0527126c605
- https://linux.oracle.com/cve/CVE-2021-31535.html
- https://linux.oracle.com/errata/ELSA-2021-4326.html
- https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc@%3Cdev.kafka.apache.org%3E
- https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc@%3Cusers.kafka.apache.org%3E
- https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7@%3Cdev.kafka.apache.org%3E
- https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7@%3Cusers.kafka.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/05/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TEOT4RLB76RVPJQKGGTIKTBIOLHX2NR6/
- https://lists.freedesktop.org/archives/xorg/
- https://lists.x.org/archives/xorg-announce/2021-May/003088.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-31535
- https://security.gentoo.org/glsa/202105-16
- https://security.netapp.com/advisory/ntap-20210813-0001/
- https://ubuntu.com/security/notices/USN-4966-1
- https://ubuntu.com/security/notices/USN-4966-2
- https://unparalleled.eu/blog/2021/20210518-using-xterm-to-navigate-the-huge-color-space/
- https://unparalleled.eu/publications/2021/advisory-unpar-2021-1.txt
- https://www.cve.org/CVERecord?id=CVE-2021-31535
- https://www.debian.org/security/2021/dsa-4920
- https://www.openwall.com/lists/oss-security/2021/05/18/2
- https://www.openwall.com/lists/oss-security/2021/05/18/3