Feeds

Oi! *Nix admin, get patching

Sendmail, openSSH and DB2 vulns

  • alert
  • submit to reddit

Beginner's guide to SSL certificates

It's become a busy week for *Nix sysadmins with the release of patches over the last few days to resolve vulnerabilities with popular applications including Sendmail, openSSH and DB2.

Those *Nix techies enjoying a sense of schadenfreude as their Windows sysadmin colleagues toiled to defend Windows systems against Blaster, Sobig, Nachi et al over the last month now have some work on their hands.



First, users of the popular OpenSSH security package need to upgrade to version 3.7.1 because of a buffer overflow flaw.


The vulnerability could allow an attacker to corrupt heap memory and trigger a denial-of-service condition. "It may also be possible for an attacker to execute arbitrary code," security clearing house CERT warns. CERT's advisory contains a links to patches from software distros that contain OpenSSH code and to OpenSSH project's own update.

An OpenSSH advisory provides a detailed technical explanation of the flaw.

OpenSSH is a free version of the SSH (Secure Shell) communications suite and is used as a secure replacement for protocols such as Telnet, Rlogin, RSH, and FTP.

SSH Communications Security products have different code base to OpenSSH and are therefore immune to the flaw.



Moving along, the ubiquitous Sendmail email server package is also affected by a buffer overflow vulnerability.


The Sendmail Consortium urges all users to upgrade to Sendmail 8.12.10 because of the flaw in address parsing, which it defines as critical. Credit for discovering the vulnerability goes to security researcher Michal Zalewski.

Although no exploit currently exists, this issue is locally exploitable and may also be remotely exploitable, a Red Hat advisory warns. Red Hat bundles the application in its distro warns. Sendmail 8.12.10 also fixes a potential buffer overflow in rule set parsing. Patches are available from the Sendmail Consortium or Linux distros.

Those not running the open source version of Sendmail are advised to check with their vendors for a patch.



Finally there's vulnerability with the version 7 of the Linux edition of IBM's DB2 database software. IBM has issued a patch, in advance of updating its technical support page with more details.


Boston security company Core Security Technologies, which discovered the problem, is expected to release an advisory later today. The flaw could allow an attacker to get "root" privileges to a DB2 database, C/Net reports. Once again the vulnerability (surprise, surprise) again stems from a buffer overflow flaw. ®

Related Stories

SSH flaws sighted
Admins slow to tackle SSL security risks
OpenSSH trojaned!
Sendmail suffers second major flaw
Sendmail vuln. Patch now
New exploit heralds Blaster 2 attack

Protecting users from Firesheep and other Sidejacking attacks with SSL

More from The Register

next story
Spies would need SUPER POWERS to tap undersea cables
Why mess with armoured 10kV cables when land-based, and legal, snoop tools are easier?
Early result from Scots indyref vote? NAW, Jimmy - it's a SCAM
Anyone claiming to know before tomorrow is telling porkies
TOR users become FBI's No.1 hacking target after legal power grab
Be afeared, me hearties, these scoundrels be spying our signals
Jihadi terrorists DIDN'T encrypt their comms 'cos of Snowden leaks
Intel bods' analysis concludes 'no significant change' after whistle was blown
Home Depot: 56 million bank cards pwned by malware in our tills
That's about 50 per cent bigger than the Target tills mega-hack
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
China hacked US Army transport orgs TWENTY TIMES in ONE YEAR
FBI et al knew of nine hacks - but didn't tell TRANSCOM
Microsoft to patch ASP.NET mess even if you don't
We know what's good for you, because we made the mess says Redmond
NORKS ban Wi-Fi and satellite internet at embassies
Crackdown on tardy diplomatic sysadmins providing accidental unfiltered internet access
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Protecting users from Firesheep and other Sidejacking attacks with SSL
Discussing the vulnerabilities inherent in Wi-Fi networks, and how using TLS/SSL for your entire site will assure security.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.