CVE-2010-2521 | Ubuntu

Multiple buffer overflows in fs/nfsd/nfs4xdr.c in the XDR implementation in the NFS server in the Linux kernel before 2.6.34-rc6 allow remote attackers to cause a denial of service (panic) or possibly execute arbitrary code via a crafted NFSv4 compound WRITE request, related to the read_buf and nfsd4_decode_compound functions.

From the Ubuntu Security Team

Neil Brown discovered that NFSv4 did not correctly check certain write requests. A remote attacker could send specially crafted traffic that could crash the system or possibly gain root privileges.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
linux	10.10 maverick	Not affected
	10.04 LTS lucid	Fixed 2.6.32-23.37
	9.10 karmic	Fixed 2.6.31-22.67
	9.04 jaunty	Fixed 2.6.28-19.66
	8.04 LTS hardy	Fixed 2.6.24-28.80
	6.06 LTS dapper	Not in release
linux-ec2	10.10 maverick	Ignored
	10.04 LTS lucid	Fixed 2.6.32-309.18
	9.10 karmic	Fixed 2.6.31-307.21
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-fsl-imx51	10.10 maverick	Not in release
	10.04 LTS lucid	Fixed 2.6.31-608.22
	9.10 karmic	Fixed 2.6.31-112.30
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-lts-backport-maverick	10.10 maverick	Not in release
	10.04 LTS lucid	Fixed 2.6.35-25.44~lucid1
	9.10 karmic	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-source-2.6.15	10.10 maverick	Not in release
	10.04 LTS lucid	Not in release
	9.10 karmic	Not in release
	9.04 jaunty	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Fixed 2.6.15-55.89

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
linux	Upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=2bc3c1179c781b359d4f2f3439cb3df72afc17fc Hardy: http://chinstrap.sne.bianheman.eu.org/~bradf/CVEs/CVE-2010-2521/patches/hardy/linux/0001-nfsd4-bug-in-read_buf.txt Jaunty: http://chinstrap.sne.bianheman.eu.org/~bradf/CVEs/CVE-2010-2521/patches/jaunty/linux/0001-nfsd4-bug-in-read_buf.txt Karmic: http://chinstrap.sne.bianheman.eu.org/~bradf/CVEs/CVE-2010-2521/patches/karmic/linux/0001-nfsd4-bug-in-read_buf.txt
linux-source-2.6.15	Dapper: http://chinstrap.sne.bianheman.eu.org/~bradf/CVEs/CVE-2010-2521/patches/dapper/linux/0001-nfsd4-bug-in-read_buf.txt

Package

Patch details

linux

linux-source-2.6.15

Dapper: http://chinstrap.sne.bianheman.eu.org/~bradf/CVEs/CVE-2010-2521/patches/dapper/linux/0001-nfsd4-bug-in-read_buf.txt

References

Related Ubuntu Security Notices (USN)

USN-1074-1
Linux kernel vulnerabilities
25 February 2011

USN-1083-1
Linux kernel vulnerabilities
3 March 2011

USN-1000-1
Linux kernel vulnerabilities
19 October 2010

USN-1074-2
Linux kernel vulnerabilities
28 February 2011

Other references

https://www.cve.org/CVERecord?id=CVE-2010-2521