<PAGE>

                                  AMENDMENT TO
                      CHANGE IN CONTROL SEVERANCE AGREEMENT

THIS AMENDMENT TO CHANGE IN CONTROL SEVERANCE AGREEMENT (this "Amendment"),
dated as of February 14, 2000, by and among Sterling Software, Inc., a Delaware
corporation (the "Company"), Computer Associates International, Inc., a Delaware
corporation (the "Parent") and Geno P. Tolari (the "Executive").

                                   WITNESSETH:

         WHEREAS, the Company and the Executive are parties to a Change in
Control Severance Agreement, dated as of November 15, 1999 (the "Agreement");
and

         WHEREAS, the Company, the Parent and the Executive desire to amend the
Agreement as set forth in this Amendment;

         NOW THEREFORE, the Company, the Parent and the Executive agree as
follows:

         1.       This Amendment shall be of no force and effect if the Offer
                  (as defined in the Agreement and Plan of Merger, dated as of
                  February 14, 2000, by and among the Parent, Silversmith
                  Acquisition Corp. and the Company) is not consummated.

         2.       The Agreement is hereby amended by replacing every occurrence
                  of the term "Employee Benefits" with the term "Medical
                  Benefits" and by the addition of a definition of Medical
                  Benefits as follows:

         (c)      "Medical Benefits" means the medical, dental, health,
                  hospital, disability and vision benefits provided under any
                  and all benefit policies, plans, programs or arrangements of
                  the Company that may now exist or any successor policies,
                  plans, programs or arrangements that may be adopted hereafter
                  by the Company in which the Executive is entitled to
                  participate or in which the Executive becomes entitled to
                  participate.


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         3.       Section 4(a)(i) is hereby amended to read as follows:

         (i)      pay to the Executive, within five (5) business days after the
                  Termination Date, a lump sum payment in an amount equal to
                  $5,820,091 as satisfaction in full for Executive's severance
                  pay and loss of certain perquisites and benefits that would
                  otherwise have been enjoyed by the Executive.

         4.       Section 4(a)(ii) is hereby amended in its entirety to read as
                  follows:

         (ii)     for 60 months following the Termination Date (the
                  "Continuation Period"), arrange at its sole expense, to
                  provide the Executive with Medical Benefits that are
                  substantially similar to the better of (when considered in the
                  aggregate) (x) those Medical Benefits which the Executive was
                  receiving or entitled to receive immediately prior to the
                  Change in Control, or (y) those Medical Benefits which the
                  Executive was receiving or entitled to receive immediately
                  prior to the Termination Date. If and to the extent that any
                  Medical Benefit described above in this Section 4(a)(ii)
                  cannot be provided under any applicable law or regulation or
                  under any policy, plan, program or arrangement of the Company,
                  then the Company will take all action necessary to ensure that
                  such Medical Benefit is provided through other means to the
                  Executive, his dependents and beneficiaries, as applicable.

         5.       Section 4(a)(iv) of the Agreement is hereby deleted in its
                  entirety.

         6.       The Company shall give the Executive the right to purchase
                  (such right to remain open until the expiration of thirty (30)
                  days from the Termination Date) at current book value, the
                  Company vehicle which was customarily provided to the
                  Executive as of immediately prior to the Executive's Date of
                  Termination.

         7.       The Agreement is hereby amended by the addition of a new
                  Section 10 (and amended as necessary in respect of required
                  renumbering):

10. NON-COMPETITION; CONFIDENTIALITY: (a) Executive agrees and acknowledges that
reasonable limits on his ability to engage in activities which are competitive
with the Company are warranted in order to protect the Company's trade secrets
and proprietary information and are warranted in order to protect the Company in


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developing and maintaining its reputation, good will and status in the
marketplace. In that regard, during the Continuation Period, the Executive will
not directly or indirectly, on Executive's own behalf or in the service of or on
behalf of any other individual or entity, either as a proprietor, employee,
agent, independent contractor, consultant, director, officer, partner or
stockholder (other than a stockholder of a corporation listed on a national
securities exchange or whose stock is regularly traded in the over-the-counter
market, provided that the Executive at no time owns, directly or indirectly, in
excess of 5% of the outstanding stock of any class of any such corporation):

         (i) participate or engage in any activities or business developing,
manufacturing, marketing or distributing any products or services offered by the
Company as of the Effective Time (as defined in the Agreement and Plan of
Merger, dated as of February 14, 2000, by and among the Parent, Silversmith
Acquisition Corp. and the Company), or any products or services offered by the
Company subsequent to the Effective Time and in which the Executive actively
participated, recognizing that the Company offers products and services globally
("Competitive Activities"), including, without limitation, (A) selling goods or
rendering services of the type (or similar to the type) sold or rendered by the
Company, whether by means of electronic, traditional or other form of commerce;
(B) soliciting any person or entity that is a current or prospective customer or
has been a customer, in each case, of the Company, while the Executive has been
employed by the Company (provided that it shall not be deemed a breach of this
Agreement if the Executive solicits such customers for goods or services
unrelated to the Competitive Activities) and (C) assisting any person in any way
to do, or attempt to do, anything prohibited by clauses (A) or (B) above; or

         (ii) solicit (other than pursuant to general, non-targeted
advertisements) any employee of the Company, who was an employee at or prior to
the Effective Time, to leave the employment of the Company.

         (b) Notwithstanding anything to the contrary herein, Executive may
remain a director at those companies for which Executive is a director as of the
Effective Time, and may engage in any activities or businesses for which the
Company has given permission in writing, which shall not be unreasonably
withheld (or delayed) following the expiration of three years from the date the
Offer is consummated, provided Executive's engaging in such activities or
business would not have a material adverse impact on any of the Company's lines
of businesses.


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         (c) (i) The Executive shall not, without the written consent of the
Company, disclose to any other person or use, whether directly or indirectly,
any Confidential Information (as hereinafter defined) relating to or used by the
Company, whether in written, oral or other form. "Confidential Information"
shall mean information about the Company, and its clients and customers that is
not disclosed by the Company for financial reporting purposes and that was
learned by the Executive in the course of employment with the Company, including
(without limitation) any proprietary knowledge, product and service designs,
trade secrets, manuals, technical information and plans, contracts, systems,
procedures, databases, electronic files, disks and printouts, correspondence,
internal reports, personnel files, information about Company employees relating
to their education, experience, skills, abilities, compensation and benefits,
and inter-personal relationships with suppliers to and customers of Company,
sales and advertising material, business plans, marketing plans, financial data
(including without limitation the revenues, costs or profits associated with
services), customer and industry lists, customer information, customer lists
coupled with product or service pricing, customer contracts, supplier contacts
and other contact information, pricing policies, supplies, agents, risk
analyses, engineering information and computer screen designs and computer input
and output specifications, inclusive of any pertinent documentation, techniques,
processes, technical information and know how. The Executive acknowledges that
such Confidential Information is specialized, unique in nature and of great
value to the Company, and that such information gives the Company a competitive
advantage. The Executive's obligations under this Section 10(c) shall survive
the termination of the Continuation Period.

                  (ii) Confidential Information does not include information
which (A) is or becomes part of the public domain other than as a result of the
Executive's disclosure; or (B) becomes available to the Executive on a
non-confidential basis from a source other than the Company, provided that
source is not bound with respect to that information by a confidentiality
agreement with the Company or otherwise prohibited from transmitting that
information by a contractual, legal or other obligation.

                  (iii) If the Executive is requested or (in the opinion of
Executive's counsel) required by law or judicial order to disclose any
Confidential Information, the Executive shall provide the Company with prompt
notice of any such request or requirement so that the Company may seek an
appropriate protective order or waiver of the Executive's compliance with the
provisions of this Section 10(c). The Executive will not oppose any reasonable
action by, and will cooperate with, the


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Company to obtain an appropriate protective order or other reliable assurance
that confidential treatment will be accorded the Confidential Information. If,
failing the entry of a protective order or the receipt of a waiver hereunder,
the Executive is, in the opinion of Executive's counsel, compelled by law to
disclose a portion of the Confidential Information, the Executive may disclose
to the relevant tribunal without liability hereunder that portion of the
Confidential Information which counsel advises the Executive he is legally
required to disclose, and each of the parties hereto agrees to exercise such
party's best efforts to obtain assurance that confidential treatment will be
accorded such Confidential Information.

         (d) If an award by a court or arbitration panel declares that any term
or provision of this Section 10 is excessive in duration or scope or is
unreasonable or unenforceable, the parties agree that the court or arbitration
panel making such determination shall have the power to reduce the scope,
duration or area or the term or provision, to delete specific words or phrases,
or to replace any invalid or unenforceable term or provision with a term or
provision that is a valid and enforceable term or provision, and this Section 10
shall be enforceable as so modified.

         (e) In the event of a breach or threatened breach by the Executive of
the provisions of this Section 10, the Company's remedies in respect of such
breach or threatened breach shall be limited to injunctive relief (and the
Executive acknowledges that the Company may not have an adequate remedy at law
and may seek injunctive relief without the requirement of posting security) and
the recovery of actual damages suffered by the Company as a result of a breach
of this Section 10 by the Executive. Notwithstanding the foregoing, in no case
shall any portion of the lump sum payment set forth in Section 4(a)(i) or any
Gross Up Payment hereunder (or any other payments made hereunder) be recoverable
by the Parent or the Company (or subject to any set-off, counterclaim or
recoupment) in respect of damages resulting from a breach of this Section 10.

         (f)      For the purposes of this Section 10, the term "Company"
includes not only Sterling Software, Inc., but also any subsidiary or
affiliated corporation of Sterling Software, Inc.

         8.       Parent shall guarantee the Company's obligations pursuant to
                  the Agreement, including without limitation, Sections 5 and 7
                  thereof. The Parent and the Company hereby acknowledge that
                  the obligations set forth in such Sections will survive any
                  termination or expiration of


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                  this Agreement or termination of Executive's employment for
                  any reason. Each party will notify the other in writing of any
                  claim by the Internal Revenue Service or any other taxing
                  authority that, if successful, would require the payment by
                  the Company of a Gross-Up Payment. Such notification shall be
                  given as soon as practicable but no later than ten (10)
                  business days after such party is informed in writing of such
                  a claim and such party shall apprise the other party of the
                  nature of such claim and the date on which such claim is
                  requested to be paid. The Parent and the Company shall bear
                  and pay directly all costs and expenses (including legal fees
                  and any interest and penalties) incurred in connection with
                  any such claim or proceeding, and shall indemnify and hold the
                  Executive harmless, on an after-tax basis, as provided in
                  Section 5(a), for any Excise Tax or income tax (including
                  interest and penalties with respect thereto) imposed as a
                  result of such representation and payment of costs and
                  expenses. The Company and the Parent also shall pay to the
                  Executive all legal fees and expenses incurred by the
                  Executive in connection with any tax audit or proceeding to
                  the extent attributable to the application of section 4999 of
                  the Code to any payment or benefit provided hereunder. Such
                  payments shall be made within five (5) business days after
                  delivery of the Executive's written requests for payment
                  accompanied with evidence of fees and expenses incurred. The
                  Company's and Parent's obligation with respect to a Gross Up
                  Payment and reimbursement of related legal fees and expenses
                  shall be absolute and unconditional and shall not be affected
                  by any circumstances, including, without limitation, any
                  setoff, counterclaim, recoupment, defense or other right which
                  the Company or the Parent may have against the Executive or
                  anyone else. Except where provided herein to the contrary, all
                  amounts payable by the Company or the Parent hereunder shall
                  be paid without notice or demand. Each and every payment made
                  hereunder by the Company or the Parent shall be final, and the
                  Company and the Parent will not seek to recover all or any
                  part of such payment from the Executive, or from whomsoever
                  may be entitled thereto, for any reason whatsoever.

         9.       The Executive agrees as consideration for the Company's and
                  the Parent's entry into this Amendment that, effective upon
                  consummation of the Offer, the Executive shall be deemed to
                  have waived all rights the Executive may have pursuant to the
                  Executive's


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                  Severance Agreement with the Company dated November 15, 1999
                  and that such agreement shall be terminated as of the date of
                  the consummation of the Offer.

         10.      Except as amended hereby, all other provisions of the
                  Agreement shall remain in full force and effect.

         11.      The validity, interpretation, construction and performance of
                  this Amendment will be governed by and construed in accordance
                  with the substantive laws of Delaware, without giving effect
                  to the conflict of laws principles of such State.

         12.      This Agreement may be executed in one or more counterparts,
                  each of which shall be deemed to be an original but all of
                  which together will constitute one and the same agreement.


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         IN WITNESS WHEREOF, the parties have caused this Amendment to be duly
executed and delivered as of the first date first written above.


                                       STERLING SOFTWARE, INC.

                                       By /s/ Don J. McDermett, Jr.
                                          -----------------------------------
                                          Name: Don J. McDermett, Jr.
                                          Title: Senior Vice President &
                                                 General Counsel


                                       COMPUTER ASSOCIATES
                                       INTERNATIONAL, INC.

                                       By /s/ Steven M. Woghin
                                          -----------------------------------
                                          Name: Steven M. Woghin
                                          Title: Senior Vice President &
                                                 General Counsel


                                       /s/ Geno P. Tolari
                                       --------------------------------------
                                                   Geno P. Tolari


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