#linux

Debian Linux Security Advisory 5783-1 - Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code.

Debian Linux Security Advisory 5782-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

There appears to be some (possibly deprecated) code associated with AF_QIPCRTR sockets in bpf_service.c. Within this file are some ioctl handlers - e.g. qrtr_bpf_filter_attach and qrtr_bpf_filter_detach. In the case of qrtr_bpf_filter_detach, the global pointer bpf_filter is fetched and freed while only holding a socket lock (and an irrelevant rcu_read_lock) - this may lead directly to double frees or use-after-free (kernel memory corruption) if a malicious user is able to call the QRTR_DETTACH_BPF ioctl on multiple AF_QIPCRTR sockets at once. Based on Android SELinux files, it appears this may be possible from some lower-privileged vendor and HAL services.

Cloudflare has disclosed that it mitigated a record-breaking distributed denial-of-service (DDoS) attack that peaked at 3.8 terabits per second (Tbps) and lasted 65 seconds. The web infrastructure and security company said it fended off "over one hundred hyper-volumetric L3/4 DDoS attacks throughout the month, with many exceeding 2 billion packets per second (Bpps) and 3 terabits per second (

Despite what lessons we thought we learned from Colonial Pipeline, none of those lessons have been able to be put into practice.

New Linux malware ‘Perfctl’ is targeting millions worldwide, mimicking system files to evade detection. This sophisticated malware compromises…

Authd PAM module up to version 0.3.4 can allow broker-managed users to impersonate any other user managed by the same broker and perform any PAM operation with it, including authenticating as them. This is possible using tools such as `su`, `sudo` or `ssh` (and potentially others) that, so far, do not ensure that the PAM user at the end of the transaction is matching the one who initiated the transaction. Authd 0.3.5 fixes this by not allowing changing the user unless it was never set before in the PAM stack. `su` version that will include https://github.com/util-linux/util-linux/pull/3206 will not be affected `ssh` version that will include https://github.com/openssh/openssh-portable/pull/521 will not be affected `sudo` version that will include https://github.com/sudo-project/sudo/pull/412 will not be affected `login` not affected `passwd` not affected <details> <summary>Old report</summary> ### Summary An user can access as another user using its own credentials ### Details ...

Linux servers are the target of an ongoing campaign that delivers a stealthy malware dubbed perfctl with the primary aim of running a cryptocurrency miner and proxyjacking software. "Perfctl is particularly elusive and persistent, employing several sophisticated techniques," Aqua security researchers Assaf Morag and Idan Revivo said in a report shared with The Hacker News. "When a new user logs

haveged is a daemon that feeds the /dev/random pool on Linux using an adaptation of the HArdware Volatile Entropy Gathering and Expansion algorithm invented at IRISA. The algorithm is self-tuning on machines with cpuid support, and has been tested in both 32-bit and 64-bit environments. The tarball uses the GNU build mechanism, and includes self test targets and a spec file for those who want to build an RPM.

Ubuntu Security Notice 7021-4 - Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.