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Unscored Public exploit CVE-2007-4571 EUVD-2007-4553GHSA-6cf8-wrcg-w8rr

The snd_mem_proc_read function in sound/core/memalloc.c in the Advanced Linux Sound Architecture (ALSA) in the Linux kernel before 2.6.22.8…

Published Sep 26, 2007 · Updated Aug 7, 2024 · Assigned by redhat

Description

The snd_mem_proc_read function in sound/core/memalloc.c in the Advanced Linux Sound Architecture (ALSA) in the Linux kernel before 2.6.22.8 does not return the correct write size, which allows local users to obtain sensitive information (kernel memory contents) via a small count argument, as demonstrated by multiple reads of /proc/driver/snd-page-alloc.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 4.0 alsa-driver 1.0.13-5etch1 DSA-1505-1
Debian 4.0 linux-2.6 2.6.18.dfsg.1-17etch1 DSA-1479-1
Debian 3.1 alsa-driver 1.0.8-7sarge1 DSA-1505-1
Debian 3.1 alsa-modules-i386 1.0.8+2sarge2 DSA-1505-1

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 5 kernel +11 2.6.18-53.1.4.el5 RHSA-2007:0993
RHEL 4 kernel +10 2.6.9-55.0.12.EL RHSA-2007:0939

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 4

References