Merge pull request #30 from adciu/master

OSG-SEC-2023-10-09 changes

docs/OSGSecurityAnnouncements.md

@@ -1,6 +1,7 @@
 
 | Date        | Title                                                 | Contents/Link       |   Risk        |
 |-------------|-------------------------------------------------------|---------------------|---------------|
+| 2023-10-11  | HIGH Severity GNU C Library Privilege Escalation | [OSG-SEC-2023-10-09](./vulns/OSG-SEC-2023-10-09.md) |     |
 | 2023-09-26  | CRITICAL PMIx race condition vulnerability affecting Slurm | [OSG-SEC-2023-09-26](./vulns/OSG-SEC-2023-09-26.md) |     |
 | 2023-09-25  | HIGH Multiple Linux Kernel Vulnerabilities | [OSG-SEC-2023-09-25](./vulns/OSG-SEC-2023-09-25.md) |     |
 | 2023-08-01  | MEDIUM OpenJDK TLS vulnerability | [OSG-SEC-2023-08-01](./vulns/OSG-SEC-2023-08-01.md) |     |

docs/vulns/OSG-SEC-2023-10-09.md

@@ -0,0 +1,32 @@
+# OSG-SEC-2023-10-09 HIGH Severity GNU C Library Privilege Escalation
+
+Dear OSG Security Contacts,
+
+A HIGH risk buffer overflow vulnerability was identified in GNU C Library's dynamic loader ld.so which may lead to privilege escalation. [1] [2]. 
+
+## IMPACTED VERSIONS:
+
+This affects RHEL8, RHEL9 and derivatives, but not RHEL7.
+
+## WHAT ARE THE VULNERABILITIES:
+
+A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.
+
+## WHAT YOU SHOULD DO:
+
+Where possible, sites running vulnerable versions should update as soon as possible. Note that updating will require a reboot of affected systems [5]. See references below.
+
+Sites also have the option of mitigation [2], however, the mitigation suggested does not persist after a restart, and so updating to a patched version as soon as possible is recommended.
+
+## REFERENCES
+
+Thanks to the EGI SVG for bringing this vulnerability to our attention.
+
+[1] https://nvd.nist.gov/vuln/detail/CVE-2023-4911
+[2] https://access.redhat.com/security/cve/CVE-2023-4911
+[3] https://lists.centos.org/pipermail/centos-announce/
+[4] https://errata.almalinux.org/
+[5] https://access.redhat.com/solutions/27943 
+
+Please contact the OSG security team at [email protected] if you have any questions or concerns.
+OSG Security Team