CVE-2023-43785

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.

Core X11 protocol client library.

Security Fix(es):

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.(CVE-2023-43785)

A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.(CVE-2023-43786)

A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.(CVE-2023-43787)

The libX11 packages contain the core X11 protocol client library.

Security Fix(es):

• libX11: out-of-bounds memory access in _XkbReadKeySyms() (CVE-2023-43785)

• libX11: stack exhaustion from infinite recursion in PutSubImage() (CVE-2023-43786)

• libX11: integer overflow in XCreateImage() leading to a heap overflow (CVE-2023-43787)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 9.4 Release Notes linked from the References section.

The libX11 packages contain the core X11 protocol client library.

Security Fix(es):

• libX11: out-of-bounds memory access in _XkbReadKeySyms() (CVE-2023-43785)

• libX11: stack exhaustion from infinite recursion in PutSubImage() (CVE-2023-43786)

• libX11: integer overflow in XCreateImage() leading to a heap overflow (CVE-2023-43787)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.10 Release Notes linked from the References section.

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.

The libX11 packages contain the core X11 protocol client library.

Security Fix(es):

• libX11: out-of-bounds memory access in _XkbReadKeySyms() (CVE-2023-43785)
• libX11: stack exhaustion from infinite recursion in PutSubImage() (CVE-2023-43786)
• libX11: integer overflow in XCreateImage() leading to a heap overflow (CVE-2023-43787)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

The libX11 packages contain the core X11 protocol client library.

Security Fix(es):

• libX11: out-of-bounds memory access in _XkbReadKeySyms() (CVE-2023-43785)
• libX11: stack exhaustion from infinite recursion in PutSubImage() (CVE-2023-43786)
• libX11: integer overflow in XCreateImage() leading to a heap overflow (CVE-2023-43787)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• CVE-2023-43785: fix out-of-bounds memory access in _XkbReadKeySyms()

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system. (CVE-2023-43785)

A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition. (CVE-2023-43786)

A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges. (CVE-2023-43787)

These are all security issues fixed in the libX11-6-1.8.7-1.1 package on the GA media of openSUSE Tumbleweed.

This update for libX11 fixes the following issues:

• CVE-2023-43786: Fixed stack exhaustion from infinite recursion in PutSubImage() (bsc#1215684).
• CVE-2023-43787: Fixed integer overflow in XCreateImage() leading to a heap overflow (bsc#1215685).
• CVE-2023-43785: Fixed out-of-bounds memory access in _XkbReadKeySyms() (bsc#1215683).

This update for libX11 fixes the following issues:

• CVE-2023-43786: Fixed stack exhaustion from infinite recursion in PutSubImage() (bsc#1215684).
• CVE-2023-43787: Fixed integer overflow in XCreateImage() leading to a heap overflow (bsc#1215685).
• CVE-2023-43785: Fixed out-of-bounds memory access in _XkbReadKeySyms() (bsc#1215683).

This update for libX11 fixes the following issues:

• CVE-2023-43786: Fixed stack exhaustion from infinite recursion in PutSubImage() (bsc#1215684).
• CVE-2023-43787: Fixed integer overflow in XCreateImage() leading to a heap overflow (bsc#1215685).
• CVE-2023-43785: Fixed out-of-bounds memory access in _XkbReadKeySyms() (bsc#1215683).

Gregory James Duck discovered that libx11 incorrectly handled certain keyboard symbols. If a user were tricked into connecting to a malicious X server, a remote attacker could use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-43785)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could possibly use this issue to consume memory, leading to a denial of service. (CVE-2023-43786)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could use this issue to cause libx11 to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2023-43787)

USN-6407-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Gregory James Duck discovered that libx11 incorrectly handled certain keyboard symbols. If a user were tricked into connecting to a malicious X server, a remote attacker could use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-43785)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could possibly use this issue to consume memory, leading to a denial of service. (CVE-2023-43786)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed XPM image files. If a user were tricked into opening a specially crafted XPM image file, a remote attacker could use this issue to cause libx11 to crash, leading to a denial of service, or possibly execute arbitrary code. (CVE-2023-43787)