Title: Sendmail Debugger Arbitrary Code Execution Vulnerability
Severity: HIGH
Description:
An input validation error exists in Sendmail's debugging functionality.
The problem is the result of the use of signed integers in the program's tTflag() function, which is responsible for processing arguments supplied from the command line with the '-d' switch and writing the values to it's internal "trace vector." The vulnerability exists because it is possible to cause a signed integer overflow by supplying a large numeric value for the 'category' part of the debugger arguments. The numeric value is used as an index for the trace vector.
Before the vector is written to, a check is performed to ensure that the supplied index value is not greater than the size of the vector. However, because a signed integer comparison is used, it is possible to bypass the check by supplying the signed integer equivalent of a negative value. This may allow an attacker to write data to anywhere within a certain range of locations in process memory.
Because the '-d' command-line switch is processed before the program drops its elevated privileges, this could lead to a full system compromise. This vulnerability has been successfully exploited in a laboratory environment.
Affected Products:
- Apple Mac OS X 10.1.0
- Apple Mac OS X 10.1.1
- Apple Mac OS X 10.1.2
- Apple Mac OS X 10.1.3
- Apple Mac OS X 10.1.4
- Caldera OpenLinux Server 3.1.0
- Caldera OpenLinux Workstation 3.1.0
- Compaq Tru64 5.1.0
- Compaq Tru64 5.1.0 B
- Compaq Tru64 5.1.0 a
- Conectiva Linux 6.0.0
- Conectiva Linux 7.0.0
- HP Secure OS software for Linux 1.0.0
- HP hplx-sendmail 1.0.0-1
- IBM AIX 5.1.0
- IBM AIX 5.2
- RedHat Linux 7.0.0
- RedHat Linux 7.0.0 alpha
- RedHat Linux 7.0.0 i386
- RedHat Linux 7.0.0 sparc
- RedHat Linux 7.1.0
- RedHat Linux 7.1.0 alpha
- RedHat Linux 7.1.0 i386
- RedHat Linux 7.1.0 ia64
- S.u.S.E. Linux 7.1.0
- S.u.S.E. Linux 7.1.0 alpha
- S.u.S.E. Linux 7.1.0 ppc
- S.u.S.E. Linux 7.1.0 sparc
- S.u.S.E. Linux 7.1.0 x86
- S.u.S.E. Linux 7.2.0
- S.u.S.E. Linux 7.2.0 i386
- SCO Open Server 5.0.4
- SCO Open Server 5.0.5
- SCO Open Server 5.0.6
- SCO Open Server 5.0.6 a
- Sendmail Consortium Sendmail 8.11.0
- Sendmail Consortium Sendmail 8.11.1
- Sendmail Consortium Sendmail 8.11.2
- Sendmail Consortium Sendmail 8.11.3
- Sendmail Consortium Sendmail 8.11.4
- Sendmail Consortium Sendmail 8.11.5
- Sendmail Consortium Sendmail 8.11.6
- Sendmail Consortium Sendmail 8.12.0 beta10
- Sendmail Consortium Sendmail 8.12.0 beta12
- Sendmail Consortium Sendmail 8.12.0 beta16
- Sendmail Consortium Sendmail 8.12.0 beta5
- Sendmail Consortium Sendmail 8.12.0 beta7
References:
- Apple: Security Updates
- Sendmail Consortium: Sendmail Homepage
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
