rhsa-2003_089
Vulnerability from csaf_redhat
Published
2003-03-19 22:09
Modified
2024-11-21 22:38
Summary
Red Hat Security Advisory: : Updated glibc packages fix vulnerabilities in RPC XDR decoder

Notes

Topic
Updated glibc packages are available to fix an integer overflow in the XDR decoder.
Details
The glibc package contains standard libraries that are used by multiple programs on the system. Sun RPC is a remote procedure call framework that allows clients to invoke procedures in a server process over a network. XDR is a mechanism for encoding data structures for use with RPC. Glibc contains an XDR encoder/decoder derived from Sun's RPC implementation, which was demonstrated to be vulnerable to an integer overflow. An integer overflow is present in the xdrmem_getbytes() function of glibc 2.3.1 and earlier. Depending upon the application, this vulnerability could cause buffer overflows and may be exploitable leading to arbitrary code execution. All users should upgrade to these errata packages which contain patches to the glibc libraries and therefore are not vulnerable to these issues. Red Hat would like to thank eEye Digital Security for alerting us to this issue. The Red Hat Linux 8.0 errata packages also contain a number of bug fixes that are not security related. For details, see the list of bugzilla bugs fixed by this errata or the ChangeLog. [Updated 9 April 2003] Some bugs newly introduced by the Red Hat Linux 8.0 errata packages has been discovered, such as wine problems or problems with debugging threaded applications. Once the glibc upgrade has been completed, you must either reboot the system or restart all programs on the system (for example, by using telinit 1 and switching back to the old runlevel). Rebooting the system or restarting the system programs is necessary to avoid vulnerable glibc copies in memory and because changes in NSS internal interfaces which mean that one cannot mix old NSS modules or libresolv in an application with upgraded NSS modules or libresolv in one running application. If sshd is running so that the other services can be restarted remotely or for a remote reboot during an unattended glibc upgrade, glibc will also restart sshd.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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        "text": "Updated glibc packages are available to fix an integer overflow in the XDR\ndecoder.",
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        "text": "The glibc package contains standard libraries that are used by\nmultiple programs on the system.  Sun RPC is a remote procedure call\nframework that allows clients to invoke procedures in a server process\nover a network.  XDR is a mechanism for encoding data structures for use\nwith RPC.  Glibc contains an XDR encoder/decoder derived from Sun\u0027s RPC\nimplementation, which was demonstrated to be vulnerable to an integer\noverflow.\n\nAn integer overflow is present in the xdrmem_getbytes() function of glibc\n2.3.1 and earlier.  Depending upon the application, this vulnerability\ncould cause buffer overflows and may be exploitable leading to arbitrary\ncode execution.\n\nAll users should upgrade to these errata packages which contain patches to\nthe glibc libraries and therefore are not vulnerable to these issues.\n\nRed Hat would like to thank eEye Digital Security for alerting us to this\nissue.\n\nThe Red Hat Linux 8.0 errata packages also contain a number of bug fixes\nthat are not security related. For details, see the list of bugzilla bugs\nfixed by this errata or the ChangeLog.\n\n[Updated 9 April 2003]\nSome bugs newly introduced by the Red Hat Linux 8.0 errata packages\nhas been discovered, such as wine problems or problems with debugging\nthreaded applications.\n\nOnce the glibc upgrade has been completed, you must either reboot the\nsystem or restart all programs on the system (for example, by using telinit\n1 and switching back to the old runlevel). Rebooting the system or\nrestarting the system programs is necessary to avoid vulnerable glibc\ncopies in memory and because changes in NSS internal interfaces which mean\nthat one cannot mix old NSS modules or libresolv in an application with\nupgraded NSS modules or libresolv in one running application.\n\nIf sshd is running so that the other services can be restarted remotely or\nfor a remote reboot during an unattended glibc upgrade, glibc will also\nrestart sshd.",
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    "title": "Red Hat Security Advisory: : Updated glibc packages fix vulnerabilities in RPC XDR decoder",
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          "text": "Integer overflow in the xdrmem_getbytes() function, and possibly other functions, of XDR (external data representation) libraries derived from SunRPC, including libnsl, libc, glibc, and dietlibc, allows remote attackers to execute arbitrary code via certain integer values in length fields, a different vulnerability than CVE-2002-0391.",
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          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nTo update all RPMs for your particular architecture, run:\n\nrpm -Fvh [filenames]\n\nwhere [filenames] is a list of the RPMs you wish to upgrade.  Only those\nRPMs which are currently installed will be updated.  Those RPMs which are\nnot installed but included in the list will not be updated.  Note that you\ncan also use wildcards (*.rpm) if your current directory *only* contains the\ndesired RPMs.\n\nPlease note that this update is also available via Red Hat Network.  Many\npeople find this an easier way to apply updates.  To use Red Hat Network,\nlaunch the Red Hat Update Agent with the following command:\n\nup2date\n\nThis will start an interactive process that will result in the appropriate\nRPMs being upgraded on your system.",
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}


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