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Candidate: CVE-2003-0462
References:
REDHAT:RHSA-2003:198
URL:http://www.redhat.com/support/errata/RHSA-2003-198.html
REDHAT:RHSA-2003:238
URL:http://www.redhat.com/support/errata/RHSA-2003-238.html
DEBIAN:DSA-358
URL:http://www.debian.org/security/2004/dsa-358
DEBIAN:DSA-423
URL:http://www.debian.org/security/2004/dsa-423
OVAL:OVAL309
URL:http://oval.mitre.org/oval/definitions/data/oval309.html
Description:
A race condition in the way env_start and env_end pointers are
initialized in the execve system call and used in fs/proc/base.c
on Linux 2.4 allows local users to cause a denial of service
(crash).
Notes:
The fix for 2.4 went into a larger patch:
http://linux.bkbits.net:8080/linux-2.4/cset@41c68e9bogrpceA9rUJa-xHwBd-P6g?nav=index.html|src/|src/fs|src/fs/proc|related/fs/proc/base.c
However, the patch for 2.6 is much simpler:
http://linux.bkbits.net:8080/linux-2.6/cset@3ff1101fZfOZMtqtcvKc_s-agJpLrQ?nav=index.html|src/|src/fs|src/fs/proc|related/fs/proc/base.c
Unfortunately, it doesn't apply cleanly to 2.4. It looks like
the fix included in 2.4.18-10 just re-typed len in
proc_pid_environ; while in 2.6 len was also retyped in
proc_pid_cmdline. Only the former deals with evn_end/env_start
pointers and the latter doesn't apply cleanly to 2.4, so I'm
just making the proc_pid_environ change.
.
hrm.. maybe there was an earlier patch to 2.4; the above 2.4
patch didn't go in till 2.4.29, yet it looks like this was
already fixed in our 2.4.27 .orig.tar.gz
.
jmm> I assume this was fixed upstream in 2.4.22-pre10?
jmm> o Fix /proc/self security issue
Bugs:
upstream: released (2.6.1), released (2.4.22-pre10)
linux-2.6: N/A
2.6.8-sarge-security: N/A
2.4.27-sarge-security: N/A
2.4.19-woody-security: released (2.4.19-4.woody3)
2.4.18-woody-security: released (2.4.18-10)
2.4.17-woody-security: released (2.4.17-1woody4)
2.4.16-woody-security: released (2.4.16-1woody3)
2.4.17-woody-security-hppa: released (32.5)
2.4.17-woody-security-ia64: released (011226.14.1)
2.4.18-woody-security-hppa: released (62.4)
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